Kratax Lithium Batteries AA Rechargeable 4 Count 1.5V 3500mWh Li-ion Rechargeable Batteries with 2H Battery Charger, 1600 Cycles Long-Lasting, Constant Voltage Output for XBox Controller, Electric Toy

Works as expected . Full charge last long

Charged super fast and the battery is still full, only been a couple days but better than regular batteries in my opinion, my last set of batteries were just regular disposables and they'd only last the day, I use them in my steelseries xl pro controller and they have not let me down yet, so I'd say yes, 10/10 would recommend

Charger works really well…However 3500 be a bit of a stretch…They run outta gas real quick…I’ll try them in a different appliance….Just to be fair

So I've purchased around 50 of these over the last year for my business - we use them in wireless mics, clickers, and wireless in-ear monitors. They work well and last a long time however there is something I noticed that is a potential problem - these DO NOT charge like a regular li-ion battery. I purchased some larger smart chargers to charge them and I found that they do not fully charge. I believe this is due to the charging regulator inside the batteries themselves. A typical li-ion charges at 4.2 volts - but these, if you read the fine print, need to be charged at 5 volts. So I can use the larger smart chargers to charge them initially up to roughly 97%, but to get them to 100% charge, I need to put them into the "dumb" chargers that come with the batteries as those run off USB (5 volts). Kind of a pain but still a money saver over alkalines, especially when you consider we'd go thru several hundred alkalines a year prior to moving to these...UPDATE: Just had the 1st casualty. Battery rolled off the table and dropped on the concrete floor (about 3') and the end broke open. It's completely dead. Hopefully it's just a fluke...

They are a little pricey! But they work fine!

I have 5 Blink cameras. I have 20 batteries. I have ran these cameras through all four seasons. There has not been any issues. When I run the batteries down, especially on the high use cameras, I charge them up when I swapBefore I go to swap out again, I top them off in the chargers.The reason I do it this way is because if a high use camera has drained the battery down to complete depletion, I don’t want it sitting at the low charge state, waiting until I need it again and then the charger may not charge it due to too low of voltage level.It could go into the danger zone of too low-voltage and never recharge again. I haven’t had this issue with these batteries, but I have with my power tool batteries and vape batteries.So back to the cameras, the batteries, (AA) work well. I haven’t used them in other devices, but I am planning on using them in a smart lock.They saved me a ton of money by not having to buy disposables. When the first camera reports battery failure, I replace all the cameras batteries. I wish the cameras report an actual battery life remaining, but I would say they last at least a month and a half if not longer depending on usage.They charge very fast with no issues.

They don't last as long as lithiums. They're good for remote controls for TVs and sound systems. They seem to charge fairly quickly. They come in handy when you run out of AA batteries and don't want to go to the store to buy more

I needed more and more for the Blink cameras. I bought these last year so I went back to add more. The old batteries that I used for the last year and they lasted the year without needed replacement (what I wanted as some of these are in the woods and snow and mess of the woods from the yard. That's for a good product and good delivery.