Newell AAA USB-C 500 mAh Battery - Newell Pro - Camera Batteries, Chargers, LED lights and more
ArmSoar 1S 500 mAh 3.7V LiPo Battery (Pack of 4)
Model 902030 500mAh 3.7V Lithium Polymer LiPo Rechargeable Battery Cells Li Po Li Ion Power For Mp3 GPS DVD Mobile Phone Headphone Recorder From Ehaotrade, $1.91 | DHgate.Com
3.7v 500mah Lithium Polymer Lipo Rechargeable Battery With Jst 1.0mm 3pin Connector 582535 For Mp3 Gps Bluetooth Camera Watch - Rechargeable Batteries - AliExpress
Universal Power Group 3.6V UB 1/2 AA Lithium Battery Cell 500 mAh C-3190-01 Used with Wireless Panic Pendants, Buttons, Alarm Transmitter and many other Sensors