6PCS 1300mAh 9V Rechargeable Batteries, 9V Rechargeable USB Lithium Long Lasting Battery, with 2 in 1 Charging Cable, for Smoke Detectors, Alarms, Keypad, Microphone

Works great and lasts a long time.

Very high quality, type C charging port on the battery is brilliant! Long run time!

EXCELLENT IDEA FOR YOUR SMOKE DETECTORS!! This will be the LAST TIME you have to go get a pack of 9 volt batteries !!! And they charge - FAST! They have a convenient light that is RED when you first start charging and then it changes to GREEN when fully charged. Cool. Just a glance and you know it is good to go. My last re-charge took less than 5 minutes .... Smoke detectors good to go !

Very handy recharging. Used in TENS unit. Wish the charge lasted longer; batteries didn’t last for the day.

I bought 2 Lazy boy recliners for the wife laast week for her birthday. and the control boxes need 2 9 volt barreries to work as backup power in the control boxes. So I bought this 4 pack for them. The were reasonaly prices for 1300 mAh betteries. they arrived within a week and charged up in less than 2 hours. I how have them installed in the power supplies for the recliners. I have not had to use them yet but I will be sure they can return the recliners to home if the power goes out. I tried them and they got it "home but not very quickly. You got to do it fast or the controller suts down.

They are rechargable batteries, they chsrge and work.

I have a guitar that uses a battery and I put one of these in it.My equipment sounded damaged, finally tried a regular battery and it was fine.They must put out some type of radiation, made my amplifier hiss like a weak radio station.These are useless to me now, not even sure if I want to trust them in the smoke alarms.Save your money, don't buy these!

Good value on quality rechargeable batteries. Should save me a lot of $$ over time. Also nice to have a recharging cable included with the batteries.