USB Power Converter AA Battery Eliminators Replace 4Pcs 1.5V AA Batteries for Remote Control LED Light Electronic Toy Aa Battery USB

I love this little contraption. I use it with my string lights and attach a timer to it. Saves me on batteries. Will be buying more sizes.

Would have liked a longer cord for my application, but the product works as described and has given no issues.

Great product for price USB powered turned a battery pack into power use which saves on cost of the batteries. Well worth the investment, especially for fairy lights.

These work with the Wii Fit board, I was desperately trying to find alternative to 4 AA batteries, I saw a lot of products that were only 2 or 3 batteries. The Wii Fit board actually does have a battery pack, but I read that it sucks. I highly recommend THIS product.

I really can’t say I was hoping it would work in my clock which takes one AA battery but this only works if you need four batteries.So four AA batteries only

For the price ($5ish) this is a fantastic deal, but note that it seems to pull 6v@1amp (5v LEDs will be bright but fine) and the USB plug gets quite hot. Forcing it down to 5v (with a block that only outputs 5v) results in a SLIGHT drop in temp. Strong advice to keep the plug well ventilated if you're using it long term, or perhaps use an AC adapter as they tend to not get as hot.

We used them for the holidays and they were perfect. The only drawback is they might not fit all AA spaces. We had to use tinfoil at times to bridge the gap. Other than they were great.

Does not give voltage that 1.5 V is like a half of volt garbage just like everything else Amazon sells