... device area. cordless phone, power tools, instrument and apparatus, electric bikes, Portable equipment: Laptop, camcorder,emergency light , Military equipment ... self-discharge5) Low internal resistance6) Long cycle life, chargeable up to 500 or 1000 times7) No memory effect8) Doesn’ ... battery cells by heat source such as fireplace or electric heater. Use the specified charger when recharging. Do not ...