Characteristics 1.Super long life: About 5 times service life than lead acid battery; 2.Powerful: Current 90-120A, easy starting 3. Maintenance free; 4.Easy usage: Just like lead acid battery; 5.Winter Nothing! Available to -20 6.Environment friendly: without any harmful substance. Safety LiFePo4 cells, the most safety one of lithium ion cells. Protected by internal BMS, with protection of: Over charge protection, Over discharge protection, Short circuit protection and over heat protection.