How to repair the broken battery, what to do if the car battery is broken

It depends on what kind of battery it is, and now the maintenance-free battery is generally used on the market, and it can only be replaced if it is broken, and only the maintainable battery can be repaired to a certain extent.

1. Remove the battery, charge it once with the charger, clean the rust on the joint, and install the battery;

2. Buy or borrow a multimeter, buy it generally not more than 50 pieces, check it, measure the contact resistance of the battery connector (after disconnecting the battery terminal, one end is connected to the inner wall of the battery terminal, and the other end is connected to the main line before the insurance), if it exceeds 100 milliohms, it is determined that the contact resistance is too large, replace or clean it up, if not, then only one battery can be replaced.

When the car battery runs out, the life is shortened by 80%, and if it has been used for a year before, it is basically broken and replaced directly.

The battery of the car generally has a service life of 2-3 years, if it is within the service life period, it is best to remove it after discharging and need to charge for 30-60 minutes, basically it can be used.

It is best not to over-discharge, so that the sharp discharge will have a great impact on the life of the battery. Generally, camel, sail, varta, doctor, and other big brands are more reliable, and the battery ** is about 300-400. Hope it helps, hope, thank you!

There is no other way, just replace it with a new one.

The car battery is broken and should be replaced with a new one.

How to fix the broken battery:

1. Discharge the battery to 0V with a bulb or differential car furnace wire, that is, clear, no electricity at all, it is best to discharge it one by one or in parallel when discharging, this work takes a certain amount of time, and you can also ride the car to the point where you can't ride it and then discharge, which will be faster.

2. Open the upper cover of the battery, add dilute sulfuric acid electrolyte with a specific gravity of 1:3 to the battery exhaust hole with a syringe and add it to the rich liquid (it can also be filled), and stop for 20 minutes.

3. Charge the battery with a full electrolyte. If it is a 20Ah battery, it is a constant current charger with a range of 70V, which can be charged by 4 batteries in series at the same time, and charged with constant current for 24 hours, without voltage limiting, the general battery can be repaired to 8-9 into new performance. If there is no charger, use the charger that is usually used to charge electric vehicles, but to charge a 20ah battery, you need to use a 10ah charger (the current is generally to charge, one can only be charged 2-3, the time can be charged for 20-24 hours, and the battery can generally be restored.)

4. If you want to repair the 10Ah battery, you can use the above method to charge it continuously with 1A current for 20-24 hours. But the current of the 10Ah charger is about too large, and a resistor can be connected in series to reduce the current to 1A.

5. The extra electrolyte in the battery can be pumped to the poor liquid with a syringe, and the repair is completed.