***Designed floating charge service life of 8 years; ****Use lead calcium tin aluminum multicomponent alloy; ***Using gas recombination technology, no need to add water during use; ***High quality raw materials, strict process control, to ensure minima self-discharge. ***At 25'C, the fully charged battery is charged at 0.1'C for 48 hours,without leakage and without deformation in appearance. ***Good overcharge resistance: After charging a fully charged battery continuously at a current of 0.1 C for 48 hours, the battery has no leakage and no deformation in high-current discharge performance: After discharging a fully charged ba廿ery continuously at a current of 15C for 5 seconds, the conductive parts do not melt or break, and the appearance is normal. ***Good safety perfo「mance: After charging a fully cha「ged battery continuously at a current of 0.2C for 5 hours and then stopping the charging, inverting the battery for 48 hours, it has no leakage and the appearance is normal.