Plantronics Explorer 390 Wireless Headset Battery (Li-Pol, 3.7V, 140mAh) - Replacement Battery for Plantronics PA-PL002 Wireless Headset battery - Walmart.com
Lithium polymer battery - Wikipedia
Li-polymer battery 3.7v 1200mah bh3v7l 3v7l type airbm for autec air a4 a6 a8 | eBay
Lithium Ion Polymer Battery - 3.7v 1200mAh : ID 258 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Amazon.com: Synergy Digital Speaker Battery, Compatible with LG XBOOM Go PL7 Speaker, (Li-Pol, 7.4V, 3500mAh) Ultra High Capacity, Replacement for LG EAC66836137-2S Battery : Electronics