... explosion-proof lead acid battery Application : UPS system,Emergency Power Supply system,solar system,railway,autos,security system KEY FEATURES: 1 ... .Good deep discharge recovery performance,7.Sealed lead acid battery,no leakage,envioronment-friendly,8.Maintenance free ... adding electrolyte is unnecessary. CAUTION:Keep the lead acid battery dry,ventilative and coolMake regular examinationFull charge ...