... , battery self-discharge is very low,7.easy storage, less maintenance;8.using ABS plastic shell and ... circuit. It should be addition charge if you don’t use, and single charge per three months, to ... the electrolyte omitted, to avoid acid corrosion.Don’t store in the space of acid gas.You ... electrolyte.Don’t clean the battery by using the organic solution. (e.g. petrol) Valve regulated storage deep cycle ...