USB Rechargeable AA Batteries 2800mWh Rechargeable Lithium AA Batteries 1.5V Double A Battery with 4-in-1 USB-C Charging Cable and LED Charge Indicator, 4-Pack

Got tired of looking for and buying batteries, these are perfect. I can recharge all at once, they last forever and work perfectly for what I need. Will be ordering more when those regular ones stop working.

My son got a Bitzee for his birthday and those things go through batteries like it is going out of style. I needed a rechargeable option so that we don't end up in the poor house. These have worked great. They have a really long life, even in the Bitzee, and they charge quickly so he doesn't have to whine that his toy is without batteries for a long period of time. I am stocking up on these and never buying a disposable battery again.

These AA rechargeable batteries with a USB-C port are a convenient solution for a specific use case I have. I use them for my beloved HHKB keyboard, which requires two AA batteries. It's frustrating when I'm on the road and the batteries run out. With these batteries and a simple USB-C cable, I can quickly recharge them and keep going.In the past, I carried a separate charger just for batteries, but the built-in charging feature of these batteries is vastly superior. While you do give up some battery chemistry quality (compared to options like Eneloops) and capacity, I believe the convenience is well worth it. Overall, the batteries have performed well for me, and I find the built-in design to be robust and perfect for my needs!

Pros:Perfect fit, fast charging, convenient, saves money and possibly the environment over time....Cons:Capacity is less than an Amazon brand alkaline AA, does not work long with high draw devices, to be fair it was pretty close to a non-rechargable alkaline AA. The high cost is another drawback but assuming you get 300 charges the price isn't bad at all. Just high up front cost.Summmary:For low draw devices like TV remotes, XBox controllers, and mini flashlights that you don't rely on for life this is a pretty good choice and will keep a few alkaline AAs out of the landfills.If you're expecting a battery that exceeds the Capacities of an alkaline disposable from a decent brand this isn't what you want. The product overall was impressive and I think this is the first generation of lithium AAs (rechargeable) so in time they will a improve. 4 stars for quality construction, and perfect dimensions, as well as USB C as the charging connection versus their competitors USB micro.Compared to the NiMH rechargeable batteries that can't even hit 1.5V and start at 1.2V this is a big improvement. The capacity exceeded my Energizer NiMH rechargeable AAs and the range of devices you can use it in is much greater. This is superior to nickel metal hydride rechargeable AAs.

Why did you pick this product vs others?:I wanted a rechargeable battery for my flashlights. As a 4 pack, I get enough batteries for my needs.Size:Just rightValue for money:That will depend on how many charges they take and how long they hold them.

I purchased the Cardien's AA rechargeable batteries for a small portable nebulizer because of their ability to recharge without having to carry a bulky charger. When we travel overnight, which is quite frequently, airlines typically charge for checked baggage, so we try to make the trip with a carry-on. These batteries are ideal for keeping down the space requirements and weight. What I didn't expect was a reasonable runtime from these batteries while still delivering a full 1.5 volts. Many small devices that operate with a small motor perform much better drawing more power than they do using the typical 1.2 volt rechargeable AA. However, these batteries are not magic. A battery can only store so much power and obviously when you're using the power at a greater rate it's not going to last as long. I'm very pleased with these batteries and have already purchased again.

The reusable AA batteries are easy to use and charge up quickly. The batteries last a reasonable amount of time. It makes me feel good that I can reuse these instead of throwing away and purchasing alkaline batteries.

I started charging them and they smelled like some kind of a chemical attack happened in my houseI tried also using them in my flash, but they worked a bit and smelled the same when I took them out. When I put them into my flash for the second time, the flash gave out an error. I'm afraid they are gonna burst or burn my new camera flash. Refund.