To reduce total voltage

To obtain higher current

To obtain higher voltage

To reduce current

Boost charge

Freshening charge

Trickle charge

Initial charge

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