9V Rechargeable Batteries, 1300mAh High Capacity Lithium-ion Long Lasting 9 Volt Batteries with 2 in 1 USB C Fast Charging Cable for Smoke Alarms,Microphone,Multimeters,Toys,Game Controllers (4 Count)

I bought these to power individual guitar pedals in a room where there is all kinds of electrical interference. They charge easily and come with an adapter that allows two batteries to charge simultaneously from one USB port. I didn't track how long they take to fully charge, but it seems like an hour or more is required. Every now and then I just grab them and hook them up to charge when I'm at my desk doing other important things. They work reliably when I need them and now I don't have to keep buying batteries to dispose when they no longer have a charge.

Good long lasting battery quick charge, never have to buy disposable batteries again and these can get pricey

I have been using these batteries for 6 months now. They charge to 9.2 volts and maintain 9.1 volts during use. Good voltage controller inside I guess. I use these batteries in radio operated target throwers several hours a week and they work well. They do not last quite as long as my pervious Hixon 600 mAh batteries but these are much easier and faster to charge. 4 stars, minus 1 star for less capacity.

I use a lot of these in my TENS UNIT. This size battery has gotten expensive & these savd me a lot.

I have saved consider amount of money being able to recharge these batteries. It does appear that the charge times decrease slightly with each recharging.

When I discovered that rechargeable 9V batteries were a thing, I thought it wouldn't hurt to try them. After considering my options, I settled upon these, because their advertised capacity appeared to be higher than most other comparable options, because the reviews seemed OK, and because the price was about right.After receiving these, I tested the charge on each with a digital multimeter and found them to be fully discharged. No problem there. I started plugged in a couple of batteries (with the supplied cable), charged them overnight, and tested them again with a multimeter in the morning. The results were disappointing...Initially, the batteries tested just over 9 volts. That's fine. But then I measured current, and it was 0. Not just 0A, but < 0mA as well. Re-testing voltage again at this point resulted in a reading of under 2V. Both batteries produced the same readings. Thinking I might have made a mistake, I charged them both overnight again, this time on a different power supply. Unfortunately, the results of testing them the following day were identical. None of them held a charge.I don't know if I just got a bad batch of batteries or if the charging cable that was provided was defective, but it's clear that these won't power any 9V-powered devices I have. It's too bad, as I'd had higher hopes. Maybe I'll have better luck with some another brand of rechargeable 9V batteries.

It lasts. very practical.Thank you all!

These batteries work… sometimes. They are really convenient when they cooperate, but I have had times where I charge it fully and then immediately upon connecting it to the device that am using (usually a guitar pedal) the battery completely discharges and is as if it has no power. Then I will plug it back in, and it indicates a full charge. It doesn’t make any sense and it’s hard to explain. I want to give them a good rating because when they cooperate, they are awesome, but they don’t always work. It isn’t always the end of the world, but when I am using them for guitar pedals at a live performance, I need them to be reliable.