AA Rechargeable Batteries, USB Rechargeable AA Batteries 1000mAh with 4 USB Ports High Capacity 1.2V Ni-MH Recyclable Recharge Battery by USB Cable(4 Count)

Great product - the batteries come with their own built in battery charger via micro USB AND the battery Charge level indicator as well. This means you ONLY charge when they need a charge - and can be charged from almost any USB power supply - like your portable phone charger OR Power brick. If you travel a lot - it is GAME OVER for ever needing to buy ANY battery at ridiculous Airport prices :)

These batteries will save you so much money in the long run! I bought these for my game controller, which has a habit of chewing through batteries, and they have been a lifesaver!

Thought this was a good product until I finished charging them. Used one battery on my razor and it lasted for barely 10mins before dying. I didn't use the charger that came with it since I wanted only one battery at the time and just used a single micro USB. I charged it over night as well before using it.Update: So I ended up using the included micro USB that charges all four batteries at the same time. I even did it for a few hours until fully charged. They still barely last 10 minutes and even trying to charge them was weird. One battery showed it was fully charged in 10 minutes yet when trying to use it. It barely lasted 2 minutes so unsure if it was error on my part or the batteries were bad to begin with.

So so

The convenience of these is undeniable. So far though, I can't tell if they are fully charged. I would expect the red LED to change to green but that doesn't happen... it stays red as long as the batter is on the charger. I'm using the batteries in an xbox controller and so far, they seem to last.

They hold the charge for a long time. I love that you can charge them without a bulky charger

The Batteries Last Ten Hours To Light A Small Mini Christmas Tree.

Great product. If you need batteries this product is a must buy!