best 9 volt rechargeable batteries for smoke detector
The first thing I noticed holding the HIKITMATE 9V Lithium USB-C Batteries 1300mAh (4 Pack) was how surprisingly lightweight it feels—just about 24 grams. That’s a huge plus because heavy batteries can be a pain, especially when used in smoke detectors that sit on your ceiling. Testing these, I found they provide steady power for … Read more