EEMB Lithium Polymer Battery 3.7V 620mAh 602248 Lipo Rechargeable Battery Pack with Wire JST Connector for Speaker and Wireless Device- Confirm Device & Connector Polarity Before Purchase

Arrived on time and works!

I purchased this to replace and upgrade the battery in a shower speaker. It works great right now, but I will update this in exactly one year, and every year after that until it dies, so everyone can see how long they last.

Replaced a battery in a little desk light. Old battery woukd not charge. Easy replacement, charged the new battery. Light works great.

Battery was stone dead on arrival. Had to take the kapton tape off and directly charge with a precision power supply cause the 0.2v battery state wouldn't get recognized by any normal battery charger. Yeah it's pretty pucker inducing to have to charge a lipo pack that way. Longevity also seriously suspect for it having been in that state

I cut the ends and soldered to the board. This replaced the battery in the bike like I have. The old one would charge. While this is larger, the size, it was able to fit and works fine.

This battery seems to work fine and has the right connections. It was just a little thicker than I expected. With a little customization to the toy robot it worked, and the toy seems to work. Not sure how to tell if the battery is fully charged. Probably not a battery problem rather a toy problem.

Used these to replace the battery on BB-8 Sphero and it worked perfectly, hold charge probably better than the original.

Battery for my Bluetooth helmet started to no hold a charge. Looked up batteries and this one said it would fit. It was a smidge bigger than the stock battery but swapped over the connector, plugged it in, charged it and now my helmet works fine and I can ride and enjoy my music again. Great purchase.