USB / DC / Solar Lithium Ion/Polymer charger [Rev C] : ID 390 : $17.50 : Adafruit Industries, Unique & fun DIY electronics and kits
Plantronics Explorer 390 Battery - Wireless Headset Batteries
Easylander Replacement LIS1577ERPC 3.7V 390mAh li Polymer Battery For Sony MP3 MP4 headset E BOOK 1/CP4/32/36 LIS1577 353236|battery replacement| battery for sonybattery for - AliExpress
LiPo Battery 300mAh + Industrial Export
Plantronics Explorer 320 Explorer 330 Explorer 340 Replacement Battery: BatteryClerk.com
Generic Standard Battery CPLD-390 3.7V 2200mAh 8.14Wh For Coolpad Catalyst 3622A with Micro USB Car Charger in Non Retail Pack - Walmart.com
Buy 3.7v 390mah Lithium Polymer 502533 Small Flexible Size Lithium-polymer Recharge Battery Pack from Shenzhen Himax Electronics Co., Ltd., China | Tradewheel.com