Specification: _x005f_x000D_ Origin: Mainland China _x005f_x000D_ Type: Module _x005f_x000D_ Condition: New _x005f_x000D_ Model Number: Step-Up Boost LiPo Polymer Li-Ion Charger _x005f_x000D_ scope: _x005f_x000D_ 2-Cell(2S) 8.4V version: _x005f_x000D_ Input voltage: DC 3-6V (DC 3.7V 5V recommended) _x005f_x000D_ Input current: 1A(1A Version);2A(2A Version);4A(4A Version) _x005f_x000D_ Charging voltage: 8.4V _x005f_x000D_ Charging current: 0.55A(1A Version);1.1A(2A Version);2.2A(4A Version) _x005f_x000D_ _x005f_x000D_ 3-Cell(3S) 12.6V version: _x005f_x000D_ Input voltage: DC 3-6V (DC 3.7V 5V recommended) _x005f_x000D_ Input current: 1A(1A Version);2A(2A Version);4A(4A Version) _x005f_x000D_ Charging voltage: 12.6V _x005f_x000D_ Charging current: 0.37A(1A Version);0.74A(2A Version);1.48A(4A Version) _x005f_x000D_ _x005f_x000D_ 4-Cell(4S) 16.8V version: _x005f_x000D_ Input voltage: DC 3-6V (DC 3.7V 5V recommended) _x005f_x000D_ Input current: 1A(1A Version);2A(2A Version);4A(4A Version) _x005f_x000D_ Charging voltage: 16.8V _x005f_x000D_ Charging current: 0.28A(1A Version);0.56A(2A Version);1.12A(4A Version) _x005f_x000D_   _x005f_x000D_ Battery Overvoltage Protection _x005f_x000D_ LED indicator: ''CR'' LED is charging status indication; ''OK'' LED is fully charged or constant voltage mode _x005f_x000D_ Working environment temperature -40°C to +85°C _x005f_x000D_ Size: 39x18x6.3mm/15.35x7.09x2.48inch _x005f_x000D_ Weight: 5g _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Note: _x005f_x000D_ Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! _x005f_x000D_ Please allow 1-2cm measuring deviation due to manual measurement. _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Included: _x005f_x000D_ 1 x  Step-Up Boost LiPo Polymer Li-Ion Charger