How to replace the battery of an ordinary battery car with a lithium battery?

First, buy a set of batteries from the Internet. When the battery arrives, remove the battery case with a screwdriver.

2

Take the battery pack out of the battery, pay attention to the positive and negative poles when taking it out, subtract the lead from the battery pack with scissors, replace it with a new battery, connect the positive and negative poles in the original wiring order, and weld it with an electric soldering iron.

three

Put the welded battery pack back into the battery box and tighten the screws. New batteries are usually full, so there is no need to charge them. After using up the battery, charge it for the first time 10 hour or so, and don't charge it for too long in the future.

four

At this point, the normal battery replacement is completed. As long as you are careful, it is very simple. Let's talk about special circumstances first. If you have a multimeter, you can use it to test the voltage across each battery pack. If it is not around 12V, there is something wrong with the battery. Usually, if one or two batteries are faulty, we only need to replace these two bad ones, which can save a lot of money.