Rechargeable AAA Batteries USB C 1200 mWh Triple AAA Rechargeable Battery 1.5V AAA Lithium Batteries with 4-in-1 Charging Cable and LED Charge Indicator, 4-Pack

Great, they work, awkward to charge but not so bad, I am using these in the 3 remotes now to test them, before I buy 4 more packs of these. I only use these in low power usage devices like remote controls and some of my medical metabolic measuring devices, still that's 16 rechargeable lithium-ion batteries I need plus an extra 4 for charged standby so I don't have to wait on charge cycles when they run low. The FireTV remote seems bad to drain batteries fast, it must be the Alexa stuff and the constant comms they do with the TV / FireTV Box.

These rechargeable batteries are a total game-changer! No more buying disposables—they charge super fast (about an hour) right from my laptop or car charger. They last way longer in my flashlight, remote, and kid’s toys compared to regular batteries. The charging lights make it foolproof, and knowing I can reuse them for years saves money and hassle. Perfect for anyone tired of dead batteries!

I haven't actually used these batteries yet, but there's a key thing to know about the Type C charging port -- you have to insert the charge plug at a slight angle. Trying to push it in perpendicantly to the battery doesn't work. Initially I thought that either the batteries or the charging cable were defective, but now that I know this, it's easy to plug them in.

This rechargeable AAA battery works great for the toys. It is very easy to charge through the type C cables. The battery lasts a very long time. The size fits well. Good value for money.

Bottom line, one was loose in my flashlight so I measured. Wikipedia says that an AAA battery should be 44.5mm long, these are not.The four batteries are 44.0, 44.2, 44.2 and 44.4 mm long. Besides all being slightly too short, the shortest of all three batteries does not make contact in a Black diamond flashlight. For something with a larger spring, this might not be an issue, but it's important to note that they do not meet specification for this battery type. In a device where multiple batteries were end to end, this shortage would be more likely to create an issue.In the photo you can see that it is clearly shorter than a name brand battery.

A very handy item to have when you need batteries for a light. Saves a lot of money on buying replacements for dead batteries in things like mini-flashlights. The built in plug makes recharging easy. Also good for the environment as you throw away far fewer batteries.

Good look, seems like very convenience but not work. They are a bit too short so they only work for some remote.

Great product, work great, hold a good charge. I bought these because I have an old digital camera that devours AA batteries. Won't even turn on if you use regular alkaline. Put in a couple of these rechargeable AAs and it works like a boss.