Hxjnldc DC 3.7V 220mah 402030 Rechargeable Lithium Polymer Replacement Battery for DIY 3.7-5V Electronic Product, Bluetooth Headset, Watch

description About this item This battery is applicable to electronic products with DIY 3.7-5V less than 0.814Wh 220mAh.（ mobile energy storage, power supply, LED light, wireless Bluetooth game headset, outdoor video and audio electronic scale, GPS Watch recorder, e-book, USB Fan tester, dash cam controller, mouse and keyboard）（★ Not applicable to high-power electric tools and model aircraft） ★Please carefully compare the polarity of the connector before use,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. ★402030 rechargeable lithium ion polymer battery, nominal voltage 3.7V, full charge voltage 4.2V, capacity 220mAh, power 0.81Wh, size 4×20×30.5mm(0.157×0.787×1.22inch）(T*W*L), Weight:5g(0.176oz)，Maximum current:0.2A。 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, 3302-26 high temperature resistant silicone cable, and genuine JST Pitch1.25mm 2-pin connector module. ★If there are any quality issues within one year, please feel free to contact us via email for replacement. See more product details