503445 3.7v lithium ion rechargeable battery polymer lithium battery 3,7 V 900MAH For mp3 mp4 mp5 phone recorder 053445 - AliExpress
603048 lipo battery|3.7v 900mah lithium polymer battery|rechargeable lithium battery with PCM | Shenzhen A&S Power battery
LiPo Battery LP952245 3.7V 900mAh 3.33Wh with protection circuit and wires 25mm
3.7V Li-ion Polymer 900mAh, what is the 3rd wire for? Trying to find a replacement but higher mAh, seems like almost all only have a + & - wire : r/diyelectronics