Verified Post by Jack morley
Published on 03 Mar, 2019
9V Batteries, Keenstone 800mAh 9 Volt Rechargeable Lithium-ion Battery 3 Pack with 3 Bay Charger
I hate replacing my 9v batteries in our fire alarms since 9v cost a arm and a leg any more. This works so well and pays for it self the first charge. I would strongly recommend this to anyone that uses 9v batteries in their fire alarms or small electronics.