3.7V Replacement Battery 250mAh 502030 with JST PH1.25 Plug for VXI Blue Parrott 052030, fits BlueParrott B250 XT, XT+ Wireless Bluetooth Headset, Roadwarrior (2 PACK)

3.7V rechargeable replacement Lithium-ion battery 250mAh, for RC Quadcopter, MP3, MP4, BlueParrott B250-XT Wireless Bluetooth Headset,Pet GPS,Keychain cam small camera C3,#3,C15/C16/C18/C21/ and more. The Lithium ion battery nominal voltage 3.7V, fully charged 4.2V, 250mAh capacity of battery, Power 0.925Wh ,item model PL502030 or 052030, Built-in battery protection circuit module PMC to prevent overdischarge and short circuit of this battery. Battery size: 30 x 20 x 5.0 mm (L*W*T), weight: 5 gram Connector Type: 2-Pin jst Pitch 1.25mm; Before replacing, please contrast with the old battery and check the polarity of the battery. Red wire connection power positive " +" , Black wire connect power negative pole "-". if is a reversed, you need position of interchange wires.