PAISUE 9V Rechargeable Batteries, 1300mAh High Capacity Lithium-ion Long Lasting Batteries for Smoke Detector Fire Alarm Multimeter Radio Microphone with USB-C Fast Charging Cable (Pack of 4)

Exactly what I needed, 9v square batteries are expensive and whilst these have the power you need they can also be usb recharged to use again and again.Used in my metal detector but could also be good for smoke alarms and toys, wherever you need a 9v these are what you should buy

USB straight into the battery so no charger needed not sure on how long they last yet as still using the battery fast delivery

The quality seems good.

These are saving me a fortune. I use them on Sennheiser radio mics and do not het any noise from the batteries internal invertor. They last longer that Duracell batteries and are rechargeable - win/win

I didn't use all of the batteries immediately but only 1 of the batteries has actually worked in any capacity the others have no charge and refuse to recharge perhaps because they were left without charge for a few months after purchasing. Whatever the reason a simple disposable battery would have delivered better value.

These batteries seem to very good. Certainly easy to charge.

Bought these for my 2 9v powered scales - None of them work in these items, so I bought a single ordinary 9v battery - it works, so why not these?They do work in my smoke detector and alarm/radio however, so they are still worth buying.

No problems bought to use with microphone on camcorder so far so good no feedback noise, will save a fortune on batteries, easy to charge and go.