To escape the gas freely
To allow oxygen enter inside
To check the level of electrolyte
To check the colour changes in the plates
Rectifier method
Trickle charging method
Constant current method
Constant potential method
Changing with new electrolyte
Replacing with new electrodes
Recharging the battery for a longer period at low current
Recharging the battery for short period at high current
Zinc
Copper
Carbon
Silver oxide
0.001182 mg/coulomb
0.01182 mg/coulomb
0.1182 mg/coulomb
1.1182 mg/coulomb
