Customer Ratings & Reviews

Output 1.5VDC like a standard battery. Charging is a challenge. I have to plug-in to the right USB port.

Work as expected. The connector to plug into USB is a little awkward and off center but once you figure that out they work well

I purchased these batteries so I could stop wasting money on alkaline batteries for my wireless headphones (after the original rechargeable batteries quit charging). They work, but only last about four to six hours. They are easy to charge, but still, the charge doesn't last as long as I would like.

I have a Surefire Titan flashlight and these batteries work flawless. Love the USB recharge. Will definitely buy more aaa and aa!

These work well. Adding the wall charger is a must

Great invention for multiple battery users looking out for other size batteries as well

Bought them for my mini drone, but the original batteries are still good.

These are great I love them and don't take a long time to charge. Be warned when I bought them I thought that they would charge in any USB port but they don't they need the charger which is sold separately, but it's on $9.99

I was a little iffy on buying the AAA version because its not a full usb male port however, it works perfectly. It charges fast and is perfect for my headphones that require AAA batteries.

I detest having to throw so many used batteries into the recycle bin or the trash. Being able to buy re-chargeable batteries without having to buy a charger is a really good solution. Plus they are partially made from re-cycled batteries.

I am glad that I bought these batteries they charge super fast and last a long time between charges! Only downside is you need the battery charger for the AAA batteries.

I bought some cheap knock off versions of USB rechargeable batteries online and found something I never thought to find in a battery - Electrical Noise! I couldn't believe it. After putting one of the cheap USB batteries in my headphones there was a very distinct and noticeable background hiss. I then took it out and put one of these in and the hiss was gone. Now, this issue might not apply to all situations where you use batteries but it is something to consider. These batteries don't have that problem.

Easy to recharge and last good between charging, would recommend to ones needing rechargeable batteries

I purchased these batteries as a daily deal and I was not disappointed, they perform just as well as the name brands

I love these batteries!! They charge exactly like it says to any USB OUTLET and they last so long!

Everyone has a smartphone nowadays, they charge on any usb adapter. Charges fast and works good.

I will have to be honest I think the batteries are super cool and I will be looking forward to technologies continue to develop and new higher demands and standards will emerge from the change some products will shine and others like this one will be a miss. The idea is awesome but I have a few tiny little bitty issues with the batteries and it is mostly the magnetic cap with it you have a battery with out you can charge with the USB port under the positive end of battery i think a stronger magnetic cap is first then the next is the loss of power and re- charge of the items I am going to have to be honest and say goodbye to the USB charging batteries. at the Price point of 4 AAA for $20. Thanks but no thanks.

Good battery,. Practical and very useful. This is a really good product for everyday use.

I like being able to charge on the go without a charger, Works in nearly any USB port. Very handy.

Saves me money on purchasing new batteries every so often