size:4R25/6V kinds:zinc carbon dry battery nominal voltage:6v jacket:plastic packing:1pcs in a shrink weight:520g discharge time:550minutes,600minutes,and 700minutes for choose shelf life:2 years. precaution &handling: (1)Do not disassemble or short-circuit batteries. (2)Do not recharge batteries. (3)Do not dispose of batteries in fire. (4)Do not allow metal objects to contact the battery terminals. (5)Do not mix with used or other battery type (such as alkaline with carbon zinc). (6)Do not solder the batteries directly. If soldering or welding connection to the battery is required, consult our engineer for proper methods. (7)Do not over-discharge batteries. Force discharging batteries by external power source in a series may cause explosion. (8)To install or remove batteries, follow the equipment manufacturer's instructions. (9)Keep battery away from small children. If swallowed, consult a physician at once. (10)Remove batteries from device when it is not in use.