2S 3S 4S 1A 2A 4A Type-C Dc 3.7V 5V Naar 8.4V 12.6V 16.8V Step-Up Boost Lipo Polymeer Li-Ion Lithium Batterij Oplader Board Function: 2S 3S 4S Type-C to 8.4V 12.6V 16.8V Boost LiPo Polymer Li-Ion Charger 7.4V 11.1V 14.8V Lithium Battery Features: Various choices, customers can choose what they need according to different needs Wide range of uses High safety performance Easy to understand and easy to operate Battery overvoltage protection Specification: 2-Cell(2S) 8.4V version: Input voltage: DC 3-6V (recommended DC 3.7V 5V) Input current: 1A(1A Version);2A(2A Version);4A(4A Version) Charging voltage : 8.4V Charging current: 0.55A(1A Version);1.1A(2A Version);2.2A(4A Version) 3-Cell(3S) 12.6V version: Input voltage: DC 3-6V (recommended DC 3.7V 5V) Input current: 1A(1A Version);2A(2A Version);4A(4A Version) Charging voltage: 12.6V Charging current: 0.37A(1A Version);0.74A(2A Version);1.48A(4A Version) 4-Cell(4S) 16.8V version: Input voltage: DC 3-6V (recommended DC 3.7V 5V) Input current: 1A(1A Version);2A(2A Version);4A(4A Version) Charging voltage: 16.8V Charging current: 0.28A(1A Version);0.56A(2A Version);1.12A(4A Version) Battery overvoltage protection LED indicator: ''CR'' LED indicates charging status ''OK'' LED is fully charged or in constant voltage mode; Working ambient temperature -40°C to +85°C Package Included： Battery module*1 Compatibility - 2S 3S 4S 1A 2A 4A Type-C Dc 3.7V 5V Naar 8.4V 12.6V 16.8V Step-Up Boost Lipo High-quality Materials - These tool accessories are made of premium material, ensuring their quality and long-lasting performance. Optimal Performance - These accessories offer versatility and adaptability and it will help you better operate your item and provide a better experience. Easy Installation - These accessories allowing you to replace and use it without hiring a professional repairman. After-sale Serive - We provide high quality products, if there is any problem with our product, please contact us.