Product Features 【 Brand new 】9V 600mah Ni-MH rechargeable battery with high quality and competitive price. High energy density, long lifespan, and can be recharged up to 1200 times in any 9V battery charger, more durable to use. 【 Compact and rechargeable】 so you can carry it anywhere anytime, more convenient to use. 【High-Performance 9V NiMH Rechargeable Batteries】280mAh High Capacity 9V rechargeable batteries support long lasting for smoke alarm detector, 1200 times Cycles can keep using for years 【Safer Using in Daily】The smart 9v charger adopt hiquick high-tech technology for protect over-charge, over-voltage, over-current and over-heat. so just safe using them 【Stranderd Size for 9V Devices】 Each batteries was test before sendging for ensure the quality. 100% compatiable with wireless microphone, smoke/fire alarms, remote controller detector,electric guitar, CO2 detector, professional speaker, GPS and so on Product Specification 1. Battery Type: Lithium-ion battery 2. Capacity: 600mAh 3. Voltage: 9V Li-ion 4. Weight: 60 g 5. Model: 6F22 Package in cluded: According to your choice