You will need
  • battery
Instruction
1
Open the tube at the top of the battery and using a special instrument, a hydrometer, measure the density of the electrolyte. To do this, in a glass tube, inside of which is a float, enter the electrolyte and dividing the float determine its density. If the density is less than 1.12, then restore it is unlikely to succeed.
2
Charge the battery fully until it boils the electrolyte in the banks. The density value should rise to 1.26-1.28. It is advisable to perform a few full cycles of discharge and charge, this charge the battery with low current, then discharge to 10.8 volts, connecting the resistance of 50 Ohms or a light bulb is 20-30 Watts.
3
Then, multiply the current by the time during which the discharged battery - so you calculate the value of the real capacity. Repeat the whole cycle again. After these manipulations, the capacity and density needs to increase. Again, measure the density with a hydrometer.
4
If after all listed actions the electrolyte density is less than 1.26, then adjust it by adding electrolyte with a density of 1.40. To do this, use a blower to remove a portion of electrolyte from the battery, but instead add a new electrolyte with high density, while the density of the resulting composition will not reach the required value.
5
Then again charge the battery a small current, not more than 2 Amps for half an hour in order to give to mix the electrolyte. Again check the tightness and if it is less than normal, then add the electrolyte.