Long Life Type (UXL Series) Battery characteristic and structure: 1.Maintenance-Free, no need to add electrolyte 2.No need to re-charge regularly 3.Long life (expected life: 10-15 years) 4.Low internal resistance 5.No leakage, no acidic gas spillage 6.Low self-discharge 7.Easy to transport Applications: marine equipment, medical equipment, alarm systems, engine starters, emergency lighting systems, backup power, UPS and standby power for computers, power storage equipment, electric power systems, telecommunication systems, controlling system