Kratax 9v Rechargeable Batteries 4 Pack 850mAh high Capacity 9 Volt 6F22 Lithium Batteries Rechargeable, 1000 Cycles for Smoke Alarms Guitar Multimeter Microphones-Charger NOT Included

I got these to replace a lot of my 9 Volt applications since they're very close to the electrical requirements of alkaline batteries WITH OUT THE FEAR OF LEAKAGE. I've had it with Duracell's leaking batteries and replaced all my batteries with these So far, no leak and good performance does it for me!!

16APR25 Of the four, 3 measured better than 850mAh and one a not too bad 822mAh (see photo). I used a 100mA charging and discharging rate. Using a RC3563 battery tester to measure resistance I found a nominal 150mΩ value. This is the lowest value I've ever seen in a 9V. I'm not sure whether, or not, the battery's internal circuitry will, non destructively, protect things in a short circuit situation. That's 60A!!

They function well for 9volt applications, although the life is more limited than non rechargeable batteries. I bought a second set to change out more often.

Buy once use many times, similar functionally to alkaline batteries but rechargeable.

These are used for instruments at our church. 2 charged up quickly and showed full. These 2 won't take a charge at all. Disappointed.

Battery meets my expectations.

Works as it should. I use it in an old style transistor and for my guitar synthesizer.

Product works for wireless guitar transmitter. Last for a full 3 hour gig. Bought 4. I Replace one every time I gig. No problems at this point. Have only recharged 4 times so far.