4-Pack Rechargeable 9V Batteries, 1300mAh 9 Volt Lithium-ion Long Lasting Power, USB-C Recharge with 2 in 1 Charging Cable for Smoke Alarms,Multimeters,Microphones,Walkie-Talkie,Toys

The Quzmo Rechargeable 9V Lithium-ion Batteries have exceeded all my expectations. With a powerful 1300mAh capacity, these batteries deliver long-lasting performance and hold up incredibly well in high-demand devices. From smoke alarms and wireless microphones to multimeters and walkie-talkies, they provide a steady, reliable voltage through the charge cycle. Another excellent feature is the presence of a USB-C charging port. Each battery being able to be recharged directly, without the need for a larger charger device, is very convenient. The 2-in-1 USB-C cable provided allows multiple batteries to be charged easily, while the small LED lights are the icing on the cake to indicate when each one is full. From a safety perspective, Quzmo has obviously given quality attention. The batteries are protected against over-temperature, overcharge, overload, short circuit, and general safeguards, so I have confidence using them in mission-critical devices like smoke detectors. They’re rated for over 1,200 recharge cycles, which is impressive and makes them far more cost-effective than disposable alternatives. I also appreciate the brand's worry-free warranty and fast customer support—great peace of mind for anybody trying rechargeable batteries for the first time. Overall, this 6-pack presents excellent value and a smart upgrade for homes or professionals who rely on 9V-powered devices day in and day out. Very long-lasting, easy to recharge, very dependable. Certainly recommended.

These Quzmo 9V rechargeable batteries work great and last a long time. The 1300 mAh capacity is impressive, and the USB-C charging is super convenient—no special charger needed. I use them in smoke alarms and a multimeter with no issues so far. Good quality and excellent value for the price. Highly recommended!

So far these are great rechargeable batteries for smoke detectors and the like. The power capacity is as described as far as I can tell in testing, and they're a direct replacement for disposable 9v batteries. You get what you pay for with these.

I would give 5 stars but have only use them for a month. I use 2 dual channel Tens units every day. Each unit uses one 9 volt. Previously I used Energizer Max, which lasted 2 days at best, and out preformed most other non rechargeable brands, but still costing a small fortune. I've tried 2 mid - low range rechargeable brands and they pooped out fast or failed completely after just a few uses. These Quzmos have been powering my tens units for 2 days constantly, so they are recharging well. If they live up to the mfg stated spec, "...recharged more than 1200 times.", and lose even 25% of charged power I'm still saving a boat load of money.

Great, easy to use/recharge. I just had to throw out a half dozen batteries which had died waiting to be used! Now these will ensure that I always have a 9v battery when I need one. I had already upgraded all of my other batteries to rechargeable ones and didn't know they made these.

Convenient, easy to charge easy to used. Most importantly. They work!!!

I have a safe that takes 9 volt batteries. It uses up a whole battery every 1-3 months so I thought rechargeable would be great. First off, these don’t charge on Apple chargers with USB C. The only thing I’ve found to work is an old charger that has a USB-A to USB-C adapter on it. New chargers that are dedicated to USB-C don’t work in my experience. I think it’s because the new chargers need some sort of intelligent device on the other end to request a specific amount of power (USB “PD” Power Delivery). But that’s not why I dislike these batteries. I charges up 2 batteries. One went in the safe lock and one went on top of the safe with painters tape covering the terminals so it wouldn’t touch anything and discharge. When it came time to change the safe battery like 2 months later the battery on top of the safe had discharged to nothing. The battery in use had more power than the battery just sitting there. This is very high internal self-discharge. These are junk cells. I’ve dealt with junky batteries before and this is nothing new.

Works! Comes with a charger line for two at the same time.

Buen producto