DC 3.7V 1900mAh 104040 Rechargeable Lithium Polymer Battery Suitable for replacing built-in 2-wire batteries in 3.7-5V electronic devices and LED lights

This battery is suitable for replacing built-in 3.7-5V batteries with 2 wires and a capacity less than 7.03Wh 1900mAh in 3.7-5V electronic devices ( Not suitable for high-power electric tools and model aircraft). Please note that connector specifications and polarity are based on the product display image. The red wire is the positive terminal “+”, and the black wire is the negative terminal “-”. Do not reverse the connection! Some products' original batteries may lack plugs, have incompatible plugs, or exhibit mismatched polarity. No worries—you can simply cut the wires and use the included heat-shrink tubing to connect the wires of the same color from the old plug. 104040 rechargeable lithium ion polymer battery, nominal voltage 3.7V, full charge voltage 4.2V, capacity 1900mAh, power 7.03Wh, size 41×40×10mm(1.614×1.575×0.4inch）(L*W*T), Weight:30.4g(1.072oz)，Maximum current:1.9A。 It can prevent overcharge, overdischarge, overcurrent, and short circuit. It consists of a high-capacity A+ lithium battery, a Japanese Seiko IC overcharge/overcurrent/short-circuit protection board, 3302-24 high-temperature resistant silicone cable, and genuine JST Pitch 2.0mm2 wire connector modules. If any quality issues arise within one year, please feel free to contact us sellers for a replacement.