These batteries are great for people suffering from Xbox battery issues of having to buy tons of batteries. They also charge fast but the value I didn't really get. I guess now it's a bit more. Don't go out if you are looking for 4 batteries for this price because these are really good.

I bought 16 of these batteries. It's a perfect set. These batteries are so much better than the typical alkaline AA batteries for some devices. I mostly use these in a few wireless keyboards and mice. These batteries give a constant 1.5 volts. But an alkaline AA battery will slowly lose voltage until it's completely gone over its life. So far they work great.

I like these Cool Gadget Rechargeable Batteries. Compared with single-used batteries, this kind of battery is built to be charged repeatedly. More expensive upfront cost than single-use batteries but cheaper in the long term. (the more you use them, the cheaper they get). Highly recommended!

I bought these batteries out of curiosity, and I didn't expect them to be so nice!!! I have a lot of devices that need batteries, but when they are out of power, I have to throw them away. I realize this kind of action harms the environment, because the traditional battery pollutes the water especially.
When I got this box, I was excited to find out the combo has 4 batteries and the cable can charge them at the same time. Excellent stuff! I like it a lot!