3.7V 1000mAh 405050 Lipo Battery Rechargeable Lithium Polymer ion Battery with JST Connector

These batteries worked great in my Exogear (ECOXBT) that I've been using since 2014. I did have to force the battery connector to fit onto my unit's original pin mounts (not quite the same size) but so far working well.

Perfect (almost) for a replacement in my Plantronics Audio 995 headset. Slightly larger than OEM but fits nicely at a slight angle. And way better capacity than the 850mAh original. Needed soldering, but don't let Plantronics tell you they are not user-replaceable. For now, just 4 stars until I've verified its capacity and tested its longevity.

Great for building circuits and other applications.

Functions as supposed to, a good size for replacing 3 AAA batteries.

Great

Power for a portable audio recorder

Plugged into my device.... immediately started smoking and dies. At least my device wasn't harmed.

This battery was wired reverse polarity in the JST connector and fried my USB charger. A little quality control would be great. Check before plugging in recommended.