USB Rechargeable AAA Batteries,450mAh AAA Batteries with USB Ports - High-Capacity Batteries Long-Lasting Power Recyclable Recharge Battery -8pack

High quality,Beautiful design I am very happy to receive AAA battery, very practical,use this cable to charge multiple devices at the same time it is suitable for my alarm clock, the battery is enough and can be used for recycling, do not worry about being late for work, it is recommended to my colleagues :)

These are what I am looking for. They are very easy to use and I don’t need buy AAA batteries anymore. These are super good for toys. Very recommend them.

Out of 4 batteries, one of them refused to charge properly. No matter how long it charged, it never got up to full battery. Which, that alone is pretty ridiculous for the price. I've seen other people commenting the same thing, so it seems like a far -too-common issue.I bought this for my new Tamagotchi. I was so excited to have such an eco-friendly, easy-to-recharge battery option, despite the price tag. Most reviewers on the Tamagotchi page are claiming their toys are lasting 3+ weeks. Mine lasted less than 5 days with these horrible batteries.I can not recommend these at all for any reason.UPDATE:I ended up putting cheap, low-drain batteries in my Tamagotchi in order to hold it over until I could buy better batteries. The low-drain are meant for weak devices, such as remotes and cheap flashlights, so I didn't expect them to last long, maybe a day or two. Somehow, they lasted 2 days longer than these ones!!! So I am certain now that these batteries are garbage, and I made a good choice returning them.

I was a little concerned about the electronics involved but these batteries have been working great for a month. I have a small mixer/amplifier combo that I use constantly for a set of sound producing devices and was getting tired of having to put new batteries in every few days. These are working perfectly so far. The batteries sit in the amp and they are also hooked up to the charging cables at the same time so they never go dead. They have not gotten hot or given any sign that this setup will be a problem. Standalone, they work for about as long as a new nonrechargable battery and they charge in a few hours. Prompted me to buy a set of double A.

I use these for my remote controls and am simply amazed I had not heard of these sooner. I have a blue million micro usb powered devices so its no hardship to charge them. They charge just as quick as normal rechargeable but don't require that special (often proprietary) charger. I may be biased by using them in such low-powered devices like remote controllers by I've only had to charge them once and I've been using for months.

Second set of this brand I have purchased, the first being a set of AA's. They charge fast and hold the charge for days-even when I accidentally leave my wireless keyboard and mouse on. The only thing that made me concerned was that one of the batteries didn't plug in smoothly the first time. It still charged perfectly and now no issues plugging it in for recharging either.

Thought this things would be a little better than what they were advertised. Not sure if it is a connection problem but of all 4 batteries, none of them are fully charged when they say they are fully charged. I've tried multiple cables, same issue. For example, they have the blue lights indicated that they are charged, but then once plugged into my hand held GPS it says they are only half. Works for a remote...but you need to charge frequently, and that's about it.

Bought these for my flashlight. Great value for the money, all 4 worked. They're only about 400mah but you can charge them VIA USB and they maintain that 1.5v until dead.6/18/20Still use them in my flashlights. All still work and charge fine.