... 3.Small internal resistance 4.Safety and explosion-proof battery charge Application : 1.Sealed manufacturing,non-pulotion,2.Avoid ... ,railway solar system.Caution:-Don't disconnect the battery charge . -Keep the battery dry,ventilative,cool, -Keep good ventilative condition ... charging-If long time storage,charge the battery before using it,-Do not clean the battery with perol,dliuent,petrol,kerosene ...