2, the new battery can not charge the battery problems? 
Usually not, and equipment for the first time the battery is charging, the voltage and current may cause instability when the battery charge to a half (sometimes more, sometimes less),
Equipment to stop charging the battery, if this happens, do not worry, just remove the battery from the device, re-re-charge.
The first charge of the new battery may require several iterative process. Please be assured that this is normal.

3, the time required to complete to start charging a new battery? 
We recommend that you first charge of not less than 12 hours, digital battery of not less than five hours.

4, the battery should be paid attention to what matters? 
Charge off the computer, unplug the power not to charge his way.
Battery should be fully charge and discharge, try to avoid using the battery is not fully charged or discharged electric charge, so as not to affect battery life.  Avoid human impacts, demolition, fall, heat or short circuit.
To use the special equipment charge.  Should avoid high or low temperature environment using battery.

5, the battery should be how to maintain them? 
New battery should be a continuous charge 12 hours.
Fully charged and discharged. Loop three times to wake up a new battery.
Prolonged use of external power. Proposal to remove the battery, so as not to affect battery life.
Regularly charge and discharge; as long [more than 1 month] does not use a computer or find the battery charge and discharge time shorter, should be in charge after the battery is fully discharged, usually at least a month to complete charge and discharge time.
Best to turn off the computer while charging, do not unplug the power drop in the charge.
Avoid human impacts, demolition, fall, heat or short circuit.

China is the world’s largest production and consumption of battery power, with the mobile phone, notebook, computer, especially the rapid development of new energy automotive industry, the future of this industry out of the used batteries will be more than a billion in 3000-5000, so in the used batteries Recycling is not only national environmental policies, but also in line with the national low-carbon economy, circular economy industrial policies. These are pictures of our products, the biggest feature of these products is that all, including BYD, including from the world’s leading battery manufacturing classes, and we sell more of these products and all of these manufacturing companies, this used to achieve orientation of the battery to the battery materials cycle, this cycle will be directed from the battery manufacturing, consumer to recycle the organic link of the entire flow of the integration, which is a marketing strategy for our unique, because waste come from, where materials go, We procurement market, where sales market to where it is.

According to this model, our business has developed from a small battery to the power of longitudinal cell cycle, lateral cell phones and laptops to electric cars carrier to do the next cycle.

In the fair period, Wang Yang, secretary also specially concerned about our recycling of used batteries Bump cycle power technology demonstration center, and hope we can become the Pearl River Delta of Guangdong Province and even the entire electric vehicle industry, supporting businesses, Bump technology cycle with the foundation, also has This expertise.

Not many people own our company, college or technical and management personnel directly involved in only 99 individuals, only 3 individuals, Dr., in addition to a professional manager, own 16 patents, 11 are invention patents. This time we have a preliminary plan to the capital market, within the next 3-5 years, with 300 million yuan power cycle the battery industry, the development of 600 million yuan 5-cell vehicle development cycle industry, of course, will put the industry in Foshan to conducted in preparation for the cashier within 20% stake, in the past three years of financial data. we have is not very high because there is no entity operating in Foshan, net profit from the enterprise and other relevant financial data, business growth, profitability and safety is good . Next five years, sales are expected to be exceeded 10 million, net profit in a million or so.

This process is accompanied by a number of business-type risk factors, because our products are associated with the non-ferrous metals, interest rates and exchange rates have some impact on us, in addition to reverse product orientation product is designed to do, waste come from, raw materials from Where, we have completely different with the raw ore, the process is a typical technology-intensive and capital-intensive business model, this business model is very unique. Another is the cash we have established across the country and the system of public recycling system of used batteries, the public collection system for all operating expenses are business themselves, so from a business point of view, it would be one of the risk.

We made this industry very good taste, but also scientific and technological strength, but also bear social responsibility. This place has some of our business VCR, please look.

Hope this little story that touched you, my lecture finished.

Moderator: Thank you, I always excellent introduction, see Which private venture capital organizations have a question for the guest.

Guest: I always Hello, Thank you for your lecture, I have a problem here, you mentioned the future development of the company strategy is to invest 5-6 billion in the battery carrier of this one, because I am not very familiar with this industry, please tell us about how fast the other business model of the market size is what kind of situation?

Yu Haijun: the equivalent of an electronic medium we are using laptops, and mobile phones used by each person, we have to open the next electric car, this is the battery carrier, the carrier of these batteries is very important to the future, growth in our industry which space. If we do not make the battery carrier recovery, then the battery to be uncollectible, it is difficult to establish a complete recycling system, we now establish the recycling system on the downstream, upstream is the battery manufacturer, scrap batteries, defective battery, battery recall , 70% lower in the hands of the people, but the recovery is difficult, people do not know the battery category, invested in the second step to know where there is environmental awareness, to establish a common battery of upstream and downstream distribution channels, carriers also need to recover again, but high-value carrier, in addition to non-ferrous metals, we need to make directional loop material of electric vehicles is critical pool materials, separator, electrolyte, but we do directional cycle can be restored to product quality, the first is energy conservation, the second we able to use high-tech industry which, so to do this kind of strategic planning is consistent with our business, also in line with the national environmental policy.

Guest: Hello I always, I am from the East VC, the first you want to introduce the battery industry is certainly a more sunrise industries, the future is very bright. I understand that the key to your heart, in the battery recycling channels, as I see commercials say, you have established the pattern of small hand in your big hand, as far as I know people are using batteries, small channels into the recovery, this one can not recover more number of batteries, for the future development of your enterprise into a virtuous cycle is very important, I think this piece of you more ideas.

The second cost recovery, probably accounting for the battery you are now the final share?

Now you reverse engineer the third piece of the market competitor?

Yu Haijun: Let me answer the first recycling system is very important, the first people in the hands of used batteries is very difficult indeed now recycling back, but now our recycling batteries, for example, more than 99% of the production process are battery factory is this part of the upstream and downstream can not do, from our business perspective, from the government perspective, from the entire social development considerations must be done, because of the need to cycle, not lost it, the landfill to can solve the problem.

The second issue of costs down and then we go into the details.

The third is the world’s original reverse design, worldwide recycling of used batteries do have a business in Belgium, Japan has a business, China is only us, but we are really the level of used batteries to achieve this quality battery materials business , there are many companies recycle, recycle batteries traders, self-employed are also very much but the recovery after the classification of borrowing to sell, do not rotate, we are really doing product design orientation and then directed the business cycle, this is our characteristics.

Related Batteries:  SONY VAIO VGN-FZ Battery SONY VGP-BPS12 Battery SONY VGP-BPS15 Battery SONY VGP-BPS21 Battery SONY VAIO VGN-FZ430E Battery Dell INSPIRON 14Z Battery Dell Vostro A840 Battery Dell INSPIRON 1440 Battery Sony VGP-BPS9 Battery

Types of Batteries

Secondary batteries-

Secondary batteries are those batteries which may be recharged many times. The number of discharge/charge cycles the battery can withstand depends on the type and size of battery and on operating condition. Numbers of cycle is varied from fewer than hundred to many thousand among them are lead-acid, nickel-iron rechargeable alkaline etc.

Batteries are also classified as dry and wet batteries-

Dry batteries-a dry battery refers to the cell that can be operated in any position without electrolyte leakage. Wet battery-these batteries have vents to allow gases generated during charge or discharge to escape. The most common wet batteries are lead-acid battery; these batteries must be operated in upright position.

Ratings of the Batteries

Batteries capacity refers to the amount of energy the battery can provide under specified condition. The conditions so specified are temperature, current drain, discharge schedule (m/hr), and final output voltage when completely discharged. The amount of energy available varies widely as these specific condition changes. The capacity of a battery is expressed in ampere-hour

Safety Concerns while Using a Battery

As per the discussion, we conclude that, if the batteries are not properly handled, they can be dangerous. The acid used in the electrolytes can cause skin burn and it is extremely harmful to the eyes. The gases released from charging battery are explosive.

Different Types of Batteries – Primary Batteries

Primary batteries: Primary batteries are also called as disposable batteries. These batteries are designed for using only once and then those batteries are exhausted and cannot be used again. Those batteries are use and through batteries. These batteries cannot be rechargeable because the electrochemical reactions take place only once and these cannot be reversible. The reactions are irreversible reactions. The primary batteries also called as dry cells because the electrolyte that is used in these batteries is a paste like material and not a liquid. Primary batteries are used in the devices which have very less current. Primary batteries will have more initial voltage and these provides good capacity. Carbon or zinc batteries are of less cost. Primary batteries mainly used in torches, toys and radios etc.

Different Types of Batteries – Secondary Batteries

Secondary batteries: Secondary batteries are also called as rechargeable batteries. These batteries can be used several times. After the batteries are discharged they can be recharged again.  These batteries can be used many years. The reactions that take place inside the batteries are reversible which means that in the secondary batteries it is possible to convert electrical energy into chemical energy by charging these batteries. It is essential to charge these batteries before using it. Re-chargers are available in the market. Acid or lead batteries are the examples of these secondary batteries.

Question: The rated voltage of my original battery is 14.4 V or 14.8 V but the rated voltage of your battery of the same model is 10.8 V or 11.1 V. Is it really applicable to the computer of the same model?

Question: How do I calculate the power consumed by my computer in an hour?

Question: I wonder how many hours my new battery can run on the computer?

Question: My battery works for three hours initially, but then it cannot be charged further. Is the battery faulty?

Question: Why does the computer display completion of charging only 10 minutes after start of initial charging the battery?

Question: The battery volume is displayed as 30% after the battery is initially charged for several hours. Why? How can I charge the battery to 100%?

Question: My battery makes the computer shut down directly without alerting or changing into the hibernation status. This occurs for several times in a few minutes after the battery is charged to full. Why?

Question: When I put the battery into the computer, the computer shuts down automatically; when I take the battery out, the computer works normally. Why?

Question: The battery does not work and the laptop powers off immediately after I disconnect the AC supply when the battery is charged to a certain percentage or even 100%. Why?

Question: The electricity volume is still displayed as 0% after my battery has been charged for 20 hours; and the computer is powered off immediately after the AC supply is interrupted. Why?

Question: Is the battery life reduced if the battery is charged before being exhausted?

Question: Do I have to remove the battery when I use the AC supply?

Question: Why is the electricity reduced before the battery is put into use?

Question: How long can a new battery drive the laptop?

Question: If I lost my official receipt

Question: What should I do if I do not have time to get my product(s) back?

Question: The rated voltage of my original battery is 14.4 V or 14.8 V but the rated voltage of your battery of the same model is 10.8 V or 11.1 V. Is it really applicable to the computer of the same model?

Answer: The safe DC voltage range of a laptop is 5.5 V 24 V, which is evidenced by the power adapter equipped for the computer. The equipped battery or the original battery falls within a safe voltage range required for rated work. As we know, the laptop batteries are lithium batteries which are characterized by: The voltage increases when the battery is charged to full, and decreases when the battery is discharged. For example, the actual effective working voltage range available from a nominal 11.1 V mAH battery is 9 V – 12.6 V. The voltage is about 12.6 V when the battery is charged to full and is about 9 V 10 V when the battery is discharged. However, 9 V – 12.6 V is the effective working voltage available from the battery to the computer. With respect to the principles of DC supply design of the computer, the original manufacturer of any computer designs the supply line of the computer mainboard in that way. Therefore, the batteries are interoperable and safe no matter whether the rated voltage of the original battery is 10.8 V, 11.1 V, 14.4 V or 14.8 V.

Question: How do I calculate the power consumed by my computer in an hour?

Answer: Such data is available from the relevant professional website. Generally, the power consumed by the computer during the running is related to the size of the computer screen, CPU, memory, hard disk and the power saving circuit design of the computer mainboard. Generally the computer screen size is 13.3, 14 and 15, and the power consumed by a standby computer is about 15WH, 18WH and 20WH respectively. Some P4 computers are defective in the power consumption design and generally consume more power. The computers prevalent in the market now are excellent in the power consumption design. The top brand computers are rather excellent in the design of power saving mode, especially SONY, IBM and TOSHIBA.

Question: I wonder how many hours my new battery can run on the computer?

Answer: Generally, the service duration of a battery is directly related to the consumption power of the computer. For example, if the computer has a 10.4 screen and a low-consumption CPU, the computer consumes a power of about 10WH-12WH in one hour of normal service. The output power provided by a working battery is: Nominal voltage multiplied with the nominal capacity is the total output power available from the battery. For example, if the battery is 11.1 V and 4400 mAh nominally, the available power output is 48.8 WH, and the battery can run for about four hours on this computer with a 10.4 screen. The power consumed is also related to the running status of the computer. If the computer is used for playing games or DVD, the computer consumes more power in the full-speed running status, and the service duration of the battery is shortened accordingly.

Question: My battery works for three hours initially, but then it cannot be charged further. Is the battery faulty?

Answer: Operate according to “Calibrate your laptop battery to optimize its performance” described above. If the problem persists, consult the local distributor.

Question: Why does the computer display completion of charging only 10 minutes after start of initial charging the battery?

Answer: Operate according to “Calibrate your laptop battery to optimize its performance” described above. If the problem persists, consult the local distributor.

Question: The battery volume is displayed as 30% after the battery is initially charged for several hours. Why? How can I charge the battery to 100%?

Answer: Operate according to “Calibrate your laptop battery to optimize its performance” described above. If the problem persists, consult the local distributor.

Question: My battery makes the computer shut down directly without alerting or changing into the hibernation status. This occurs for several times in a few minutes after the battery is charged to full. Why?

Answer: Operate according to “Calibrate your laptop battery to optimize its performance” described herein above. If the problem persists, consult the local distributor.

Question: When I put the battery into the computer, the computer shuts down automatically; when I take the battery out, the computer works normally. Why?

Answer: That indicates the battery is faulty. That occurs rarely and is possibly caused by technical faults arising from short-circuit protection of the battery interface. In this case, contact your distributor to replace the battery.

Question: The battery does not work and the laptop powers off immediately after I disconnect the AC supply when the battery is charged to a certain percentage or even 100%. Why?

Answer: When this problem occurs, check whether the ambient temperature is too high. If the laptop is used in a high-temperature environment for a long period, the battery will be disconnected for purpose of protection. In this case, in order to prevent accidents, shut down the laptop first, take out the battery, and then reload the battery. Another possibility is that your computer is faulty in the process of charging. In this case, check the computer because the charging circuit of the computer tends to fail in case of charging. In this case, use the original battery instead and check whether the computer works normally. If the problem persists, contact our distributor to replace the battery.

Question: The electricity volume is still displayed as 0% after my battery has been charged for 20 hours; and the computer is powered off immediately after the AC supply is interrupted. Why?

Answer: First, check whether the battery contacts the laptop properly. Improper contact makes it impossible to charge the battery even if the communication data of the battery is readable. In this case, try to unplug and plug the battery for more times. If you hear a clatter after inserting the battery into the laptop, it is generally regarded as proper contact. Try inserting for more times, and you will know whether the laptop contacts the battery properly. Pay attention to this especially when you use an IBM laptop. If you are sure that the battery contacts the laptop properly but the battery still does not work normally, the battery may be substandard. This problem is caused by two factors: (1) The line board of the battery is damaged or short-circuited; (2) the battery may be incompatible with your laptop, which is a technical problem and needs to be solved by us. Please contact distributor to check the status of the battery.

Question: Is the battery life reduced if the battery is charged before being exhausted?

Answer: The calculation of the battery life is based on complete cycles of charging and discharging. The life of a lithium battery is generally 300-400 cycles. You do not need to worry whether the battery is charged for a cycle once the AC supply is connected. Only a complete cycle of charging or discharging counts as a cycle when calculate the battery life.

Question: Do I have to remove the battery when I use the AC supply?

Answer: Generally, the charging of a laptop battery begins only when the electricity volume is lower than 95%. Due to existence of natural consumption, the battery consumption is basically the same no matter whether you remove the battery or not while the computer is working. However, we recommend you not to remove the battery while operating the computer because this prevents the data loss in case of abrupt interruption of the AC supply. If you remove the battery, wrap it into a fresh keeping film and put in a dry and cool place. Remember to perform a complete charging and discharging cycle for the battery every month to prevent the battery from losing activity.

Question: Why is the electricity reduced before the battery is put into use?

Answer: Due to influence of ambient humidity and non-insulated environment, the battery is consumed naturally. Depending on the newness and quality of the battery, the electricity of the battery is reduced by about 1% in 3-4 days. Therefore, a moderate reduction of electricity is normal.

Question: How long can a new battery drive the laptop?

Answer: It is difficult to determine the operation time of the laptop battery. The actual operation time depends on how much electricity is required by the device. The screen size, hard disk and other accessories may consume extra electricity and shorten the operation time. The total operation time of the battery also depends on the design of the device. Generally, a battery of a standard volume is designed to drive the computer for more than two hours.

Question: If I lost my official receipt

Answer: Warranty is valid only if customer can present the Warranty Card and official purchase receipt whenever any warranty service is required, during the warranty period

Question: What should I do if I do not have time to get my product(s) back?

Answer: Customer can request us to mail the repaired product(s) back by express (must be commercial delivery address). HK$20 will be charged for such service and please inform us to arrange this service. Customer should be responsible for transporting fee of the express services.

How to use the laptop battery properly

Calibrate your laptop battery to optimize its performance

Inside the laptop battery is microprocessor software, which calculates the battery volume during the charging/discharging. Batteries must be calibrated from time to time to ensure correctness of the time and the percentage

displayed on the screen. You must implement a complete cycle of charging and discharging the battery at the beginning of using the computer, and repeat this cycle every two or three months. The charging and discharging

procedure is as follows:

1）. Set the Power Supply option first: Right click on the screen and select Property -> Screen Saver -> Power Supply -> Power Use Scheme -> Portable. In all the subsequent operations such as When Computer and Use Battery, select Never. Under the Alert option, deselect Alert for deficient battery and Alert for serious battery shortage.

2）. Disconnect the power adapter and use the battery until the computer is powered off due to exhaustion of the battery.

3）. Connect the power adapter until the battery is charged to 100%. Before initial use of the computer (or resuming use of the computer after long-term storage), the battery must be

charged to full and discharged for 3-4 times to optimize the performance. The charging process takes more than five hours.You must discharge the battery to let the computer power off, and then charge the battery to 100% to

calibrate it. Then you can connect or disconnect the power supply anytime regardless of the status of the battery volume. Moreover, you can perform a deep charging and discharging cycle under control of the protection circuit

in a time segment to calibrate the electricity statistics of the battery. However, this does not increase the actual capacity of the battery.Tips: When the battery becomes “empty”, the computer enters the hibernation mode forcibly.

The battery reserves a certain electricity volume to ensure that the computer can hibernate for a time segment. When the battery is really exhausted, the computer is powered off forcibly. At this time, any open documents will

be lost.

Storage of laptop battery

If the battery is stored for a long time in the closed-circuit mode, the battery is damaged. If the battery needs to remain idle in a month or a longer time, remove the battery out of the computer, charge it to 60%-80% and store

it in a dry, cool and clean place. If the battery remains idle for a long time, the electricity of the battery is ultimately lost and the battery may be damaged. Therefore, after the battery is stored for a time period, it is necessary to

perform an effective charging and discharging cycle for the battery. By performing a complete effective charging and discharging cycle for the battery every month, you can ensure a proper storage status and a reasonable service

life of the battery.

Laptop batteries and other products warranty return policy and QA range

Our product warranties exist in the two terms. The first is the 30 Days Defective Products Return Guarantee, the second is the One Year Limited Warranty.

Since all warranty transactions are time sensitive, the customer is required to fully inspect the product upon delivery. Be sure to retain any barcode materials in good condition or other obviously evidence such as products photos to prove the products are ours since they may be required in order to process a return.

30 Days Defective Products Return Guarantee

We will accept returned defective merchandise within the first 30 days after purchase on a no questions asked basis according to the following conditions:

1. All returned products must include an barcode number. This number can be acquired by contacting the After-sales Service Department.
2. All returned of our brand products must include original packaging, software,manual, documents, etc. with the returned merchandise.
3. Customer is responsible for return shipping and insurance fees. Uninsured item damaged in shipping will void the guarantee.
4. Returned items that are functional, undamaged and free of defects will generate a restocking charge of 15% of the original invoice amount.
5. The refunded amount will consist of the invoice amount of the item, less the restocking fee. Original charges for shipping, handling, etc. will not be refunded.

One Year Limited Warranty

We warrants your product against all defects in materials and workmanship. This warranty is effective on the purchase date of the product and expires one year from the original purchase date based on the barcode printed.

1). Remedy : At our discretion,We will either repair or replace your devective product free of charge. We will not pay shipping charges that you incur for sending your product to us.

2). Warranty Exclusions : Warranty does not apply to your products under any of the following conditions:

1. The barcode has been removed or modified.
2. Your products have been subjected to misuse or damage (including water damage, physical abuse, and/or improper installation).
3. Your products are damaged by dismantled privately. All the damage of force majeure (Fire or flood .)
4. For our brand products,your receipt or proof-of-purchase is from a non-authorized dealer or internet auction site including E-bay, U-bid, or other non-authorizedresellers.

How to return and exchange the defective products

We product quality warranties exist in the two terms. The first is the 30 Days Defective Products Return Guarantee, the second is the One Year Limited Warranty.

Since all warranty transactions are time sensitive, the customer is required to fully inspect the product upon delivery. Be sure to retain any barcode materials in good condition or other obviously evidence such as products photos to prove the products are ours since they may be required in order to process a return.

Products return rules statement :

All returned products must include an barcode number. This number can be acquired by contacting the After-sales Service Department.

All returned of our brand products must include original packaging, software,manual, documents, etc. with the returned merchandise.

Customer is responsible for return shipping and insurance fees. Uninsured item damaged in shipping will void the guarantee. We is not responsible for products lost in shipment between the owner and our service center.

Returned items are not functional for all of our products undamaged and free of defects

Contact with our After-sales Service Department to obtain our Products Return Address.

Don’t Run It Down to Empty

Myth: You should never recharge your battery all the way.

Keep It Cool

Give It a Rest

Myth: Refrigerate your battery.

Heal a Sick Battery

Myth: You can rejuvenate a worn-out battery.

Longer Life Between Charges

Myth: Adding RAM saves battery life.

Here’s how to charge any battery enough to keep doing the important stuff.

Fact 1: All past and future rechargeable batteries can be safely trickle charged if you don’t overcharge them. Trickle means low current, like half an amp for an average camera or phone battery.
Fact 2: Small incandescent bulbs such as flashlight bulbs and christmast tree mini lights make great current regulators.

This is the battery to my Canon S30. It’s got three terminals, labeled “+”, “-”, and “T”.
I’ve clipped alligator-clips onto the two obvious ones.
You don’t need clips, you can just hold wires on it for as long as it takes to charge, that’s probably better anyway, so you can tell if anything is going wrong.

Warning! Wear eye protection and if anything weird happens don’t breathe the fumes!

step 1  Hands on Charging

What was that other terminal marked “T” for? TIMMY of course, just like in the nursery rhyme!
It’s for Timmy to to hold his finger on the battery. If it gets hot you’re doing something wrong.
Actually it’s “Thermistor” or similar names. Temperature sensor. Some batteries use that to regulate charging current, some just for a safety feature.

“Digital sensor, huh?” would be a running joke back when Americans knew Greek and knew that digits are fingers. But then numbers got so much use we forgot about counting on fingers, and now people barely know how to do anything with their hands.

Anyway, here’s a finger used as a digital thermometer. Which reminds me of the joke about the doctor…

step 2 Charge from Car Battery with Lightbulb Regulators

WARNING: scroll to the bottom if you want to read safety warnings.

Here I am charging my camera’s battery from my car battery. I’m using three christmas lightbulbs at once as a current regulator to get half an amp to flow into the camera battery.
Here’s how it works:
As the current through a lightbulb increases, the filament gets hot. That increases the resistance, which limits the current.

For example, here’s my test of one of these mini christmas lightbulbs hooked up to a bench DC supply:

Volts Amperes
.5 .05
1 .07
1.5 .08
2 .09
3 .11
4 .13
5 .15
6 .16
7 .17
8 .18
9 .18
10 dead. The filament burned out.

I tested two bulbs and the data was the same.

Since my car battery is at ~13 volts and the camera battery is at ~7 volts, there will be 6 volts across the bulb. So I put three bulbs in parallel to get about 0.5 amperes to flow into the battery.
I’m guaranteed that less than 0.6 amps will flow, because that would burn out the bulbs.
That’s some protection against reverse-charging, but do make sure you connect the plus terminals and minus terminals correctly.

Now just stand there for fifteen minutes or so until your battery is charged enough to take pictures again, you can make calls on your phone or whatever.

SAFETY WARNINGS:
Do not leave this unattended, and don’t attempt to fully charge the battery.
If you charge too long and your camera battery gets over 8 volts, bad things could happen.
“Bad things” include possibly catching on fire.
Repeat: you can safely trickle charge any rechargeable battery part way.
But it is NOT SAFE to fully charge a battery without fully understanding the rules for that specific type of battery.
Car Batteries can produce a mixture of oxygen and hydrogen which can be ignited by a spark.
The resulting explosion sprays sulfuric acid everywhere. Don’t let that happen to you. For simplicity’s sake this photo shows me working right on the battery, but you could just as easily get your battery voltage from the cigarette lighter inside the car, far from the explosion hazard.
Also, don’t electrocute yourself. I haven’t heard of anyone being electrocuted by a car battery. I have heard of the other accidents described here actually happening.