DC 3.7V 2100mAh 804050 li-ion Lithium Ion Polymer Battery Replacement for DIY 3.7-5V Electronic Products with Built-in 2-Wire Battery Replacement, Mobile Energy Storage Power Supply

This battery is suitable for DIY electronic products with 3.7 -5V and less than 7.77W h 2100mAh built-in 2-wire battery replacement. Not applicable to high-power electric tools and model aircraft
Please note that the specifications and polarity of the connector are based on the product display image, 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.
804050 rechargeable lithium ion polymer battery, size 2 x 1.574 x 0.314 inch(51×40×8mm) (L*W*T), nominal voltage 3.7V, full charge voltage 4.2V, capacity 2100mAh, power 7.77W h, Weight: 1.16 oz (33g)
Maximum current: 2.1A It can prevent overcharge, overdischarge, overcurrent, and short circuit..
Its consists of of large-capacity A+ lithium battery, Japanese Seiko IC overcharge and overcurrent short circuit protection board, 3302-24 high temperature resistant silicone cable, and genuine JST Pitch 2.0 mm 2 wire connector module.
If there are any quality issues within a year, please feel free to contact us via email for replacement.