How To Refill Car Battery Acid. To add water to a car battery you will firstly need to remove the cell vent tops. The small 7 and 12 Ah lead acid batteries can be refilled and often brought back into service.
I have been reading up on how to bring back batteries. All the chemical needed to make sulfuric acid is still in the battery it is just the water that is gone. If you add more acid you will be changing.
Wait for 24 hours.
This is just a quick video filling up a new lead acid style battery and getting it charged up and ready for use. All the chemical needed to make sulfuric acid is still in the battery it is just the water that is gone. Remove the battery from the box. Just like how you cant go without water neither can your battery.
