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This old battery charging method is very good, after watching, anyone can do it! This old battery charging method is very good, after watching, anyone can do it! We use phone chargers to charge the battery very well. But you should note to prevent explosions, only recharge the batteries that are still solid, the voltage of the new battery drops above 1.2v and should also charge for a short time of 30 minutes to 1.5 hours only, mainly to activate the battery for us to use temporarily when we have not bought a new battery to replace it. When charging after 30 minutes, if you touch the charger and the battery feels too hot, stop charging immediately, because this type of charger does not automatically turn off when the battery is full. Do not charge for too long, do not recharge deformed, rusty batteries and batteries that are too weak below 1.2v. In general, when you are in a pinch and cannot buy a new battery, use this method to activate the battery for temporary use. The best way is to buy a new battery when the battery is weak to use, now a new battery is also cheap. -Thi Nhan Tips and Tricks wishes you a happy watching VIDEO. If you find the VIDEO useful, click LIKE, subscribe, and share with your friends. #meovatthinhan