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 2S 3S 4S 1A 2A 4A Type-C Dc 3.7V 5V Naar 8.4V 12.6V 16.8V Step-Up Boost Lipo Materials: Made of high quality materials, robust and durable, safe and convenient to use. Size: matched to the corresponding model to match your working tool needs, check if it is the size you need before you buy. Function: This is a good companion you need on your tools, giving you a more convenient working life, in case you are busy indoors and outdoors Satisfaction guarantee: Your purchase is fully protected when you order today. If you are not satisfied with with our products, contact us any time, We will get you back within 24 hours try our best to make things right.