3.7V 450mAh 502535 Lipo Battery Rechargeable Lithium Polymer ion Battery Pack with JST Connector

I bought a v-moda crossfade wireless headphones a while ago. The battery only lasted a year and a month. Since the warranty is only for one year, they didn't want to replace the unit. Looking a post I found out that I could replace the battery myself, so I bought this one and it worked perfectly. The original battery is 350mAh but I bought this 450mAh which also fit the battery compartment. Now my headphones have a better battery life than before. One thing that I liked about this battery is that it has (which I think it is) a build date; I bought mine on Dec 1 19, and the build date was from sept 19.

I had to order a new remote control for my Alphard V2 and it died after 9 holes of golf. The company sent me a new one but didn't want the defective one back. I took it apart and measured the battery voltage at 0.85 volts. I ordered this one to replace it. The battery was soldered onto the circuit board, so I cut the connector off and soldered it to the board. Works like a charm. Other reviewers have given it bad reviews because they didn't bother to check the polarity of the connector. If you don't understand DC electricity, don't attempt your own repairs!

I bought two of these batteries to use with Adafruit Powerboost 500 to use with some ESP8266 projects. I made an assumption that the wiring of the connector was NORMAL. IT WASN'T. I got a shock plugging the battery in and then I immediately smelled that old, tell tale, electrical burning smell. I quickly unplugged the battery and looked at it closely.As you can see in the picture, the one on the left is the ORIGINAL configuration of the connector. On every other LiPo battery I've ever bought... the RED wire (+power) is on the LEFT. The battery on the right is the second battery I received and which I had swapped the wires in the connector.Not sure WHY/WHAT these wires were reversed from a normal configuration but this is VERY DANGEROUS as it could have caused the battery to overheat and explode.Anyone thinking about buying these batteries to use in a project expecting NORMAL wiring on the connector.... DON'T BUY THESE.If I could have given a negative rating I would.

Installed in Retkess T128 wrist receiver. Installed battery leads were soldered to board, so I clipped the JST connector and stripped/tinned the leads and soldered to the board. Success! Battery life much improved.Take care when soldering to board. The connection points are very close together and would be easy to bridge between them which would result in an unhappy short circuit.

I've had my Crossfade 2 headphones for about 6 years and while I still love them, the battery life was starting to show it's age. Found a tutorial online for replacing the battery and this one seemed like a suitable replacement. Unfortunately the first one I received arrived DOA and I didn't bother to check the voltage before installing it so that was on me, but still frustrating. 2nd one arrived and did the trick. Listening time seems at least as good as when these headphones were new. One thing I did different than the online instructions called fir is I just cut the wires and soldered them together instead of trying to solder to the board. Much easier and less chances of something going wrong.

My daughter complained that her $20 bluetooth headphones would only last about 15 minutes on a charge. I took them apart and discovered the battery had expanded and needed to be replaced.We could replace the entire unit, but I thought I'd try to replace the battery. The replacement was straightforward following a youtube tutorial. This battery last 3-5 times longer than the original. She can charge once per week with regular use. She is super happy. And she can keep using her favorite headphones.

Battery works as expected. No issues so far. I did not test capacity but seems to be okay.

I bought this to replace a battery in a Bluetooth music cube that had no life left. It was a perfect match and once I changed it out, the cube battery life is great. Highly recommend changing out batteries on old devices before tossing them. The battery is a fraction of the cost of a new unit. :-)