Compatible with Sena 10S series，Sena 10S-01， Sena 20s series，Sena 20s-01，Sena 20s evo，Sena 30K series，Sena 30K-01D Bluetooth Headset Battery Replacement。It can also be used in other 3.7-5V electronic products with power less than 3.33Wh (900mAh).（★ Not applicable to high-power electric tools and model aircraft） Please compare the connector specifications and polarity according to the display diagram before purchasing,★the red wire is the positive "+" and the black wire is the negative "-"，Do not reverse-charge or reverse-connectreverse. ★The primary battery of some products has no plug or mismatched plug or mismatched polarity. It doesn't matter, you can cut and solder the plug directly or use our heat shrinkable insulating sleeve to connect the same color wire. 802540 rechargeable lithium ion polymer battery, nominal voltage 3.7V, full charge voltage 4.2V, capacity 900mAh, power 3.33Wh, ★size 8×25×41mm(0.315×0.984×1.614inch）(T*W*L), Weight:18g(0.635oz)，Maximum current:1A。 It can prevent overcharge, overdischarge, overcurrent, and short circuit. It‘s consists of of large-capacity A+ lithium battery, Japanese Seiko IC overcharge and overcurrent short circuit protection board, 3302-28 high temperature resistant silicone cable, and genuine JST Pitch1.0mm 2-pin connector module. If there are any quality issues within a year,★ please feel free to contact us via email for replacement.

Package:802540 900mAh LiPo battery x 1,heat shrinkable insulating sleeve x 1

Compatible with Sena 10S series，Sena 10S-01， Sena 20s series，Sena 20s-01，Sena 20s evo，Sena 30K series，Sena 30K-01D Bluetooth Headset Battery Replacement。It can also be used in other 3.7-5V electronic products with power less than 3.33Wh (900mAh).（★ Not applicable to high-power electric tools and model aircraft）

size 8×25×41mm(0.315×0.984×1.614inch）(T*W*L)
voltage:3.7V
Capacity:850mAh
Weight:0.59oz（16.8g)
Maximum current:1A