... CharactersA. Rechargeable high capacitance 800mah lead_acid storage battery inside, maintenance-free.B. An extra long-life battery, more than 500 times recycle allowed.C ... using ,for long -term emptiness will do harm to the battery , each recahrging time should not over 14 hours , to ... keep the battery long -life, please recharge it once every 3 months for ...