Rectifier method
Trickle charging method
Constant current method
Constant potential method
Barometer
Hydrometer
Lactometer
Thermometer
Check the level of electrolyte
Release the gas produced
Enter the oxygen from atmospheric air
Check the condition of plates
Solid grease
Petroleum jelly
Lubricating oil
Liquid grease
Decreases
Increases
Remain same
Falls to zero
