LONG-LASTING POWER:These accu ultra batteries with low self-discharge are pre-charged and ready to use for your convenience with a 250mAh capacity. It provides long-lasting power to your everyday devices at up to 1000 charges. The batteries have a durable shelf life when unused until they are required. These rechargeable batteries are ideal for high-power devices. Note - Charging devices are sold separately.RECHARGEABLE:The rechargeable hybrid technology (nickel-metal hydride) produces less waste than standard disposable alkaline batteries and is more affordable overall. Save money and reduce waste with Accu ultra batteries.PACK OF 4:This package contains a single 9V PP3 NiMH rechargeable battery, designed with easy-open packaging for your convenience. These batteries are environmentally friendly, containing 0% harmful metals such as cadmium and mercury. Each battery is encased in a robust, leak-proof casing to ensure the safety and longevity of your household devices.SAVE MONEY:These NiMH Rechargeable accu ultra 9V PP3 Batteries can be recharged many times, saving you money and reducing waste They are an economical replacement for disposable alkaline batteries. They retain 75% charge for up to one year in storage.OTHER USES:Smoke Alarms, Metal Detectors, Walkie-talkies, Digital toys and games, radio controlled toys, tools, torches, flashlights, digital devices including radios, clocks, power backup, garage door remote controller, flashlight, kids toy, electronic pets, radio controlled car kids, alarm burglar sensors & system, alarm clock, remote control, flash gun, flashgun, diffuser, thermometer, torch and More.