Specification: Origin: Mainland China Type: Voltage Regulator Condition: New Application: TV Supply Voltage: DC 3-6 V Model Number: Lithium Battery Charger Module Type(optional): 2 strings 1A/2 strings 2A/2 strings 4A/3 strings 1A/3 strings 2A/3 strings 4A/4 strings 1A/4 strings 2A/4 strings 4A Product Description:  2S 3S 4S Type-C to 8.4V 12.6V 16.8V Boost LiPo Polymer Li-ion Charger 7.4V 11.1V 14.8V 18650 LiPo Battery Range: 2-Cell (2S) 8.4V Version: Input voltage: DC 3-6V (DC 3.7V 5V recommended) Input current: 1A(1A Version);2A(2A Version);4A(4A Version) Charging voltage: 8.4V Charge current: 0.55A(1A Version);1.1A(2A Version);2.2A(4A Version) 3-Cell(3S) 12.6V Version: Input Voltage: DC 3-6V (DC 3.7V 5V recommended) Input current: 1A(1A Version);2A(2A Version);4A(4A Version) Charging voltage: 12.6V Charge current: 0.37A(1A Version);0.74A(2A Version);1.48A(4A Version) 4-Cell(4S) 16.8V Version: Input Voltage: DC 3-6V (DC 3.7V 5V recommended) 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 over-voltage protection. LED indicators: "CR" LED for charging status indication "OK" LED for full or constant voltage mode; Operating ambient temperature: -40°C to +85°C Product size: 39 x 18 x 6mm/1.5 x 0.7 x 0.2inch Note: 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! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1 x Lithium Battery Charger Module 1. Multiple Options: Our Lithium Battery Charger Module offers multiple options, allowing customers to choose the specific module that meets their particular needs. This ensures that customers can find the right module for the job and avoid wasting money on unnecessary features. 2. Versatile: Our battery charging board can be used in a wide range of applications, including charging lithium batteries for electric vehicles, drones, power tools, and more. This versatility makes it an ideal accessory for anyone who regularly works with lithium batteries. 3. High Safety Performance: Our step-up boost LiPo polymer charger has a high safety performance, including over-voltage protection, over-current protection, short circuit protection, and temperature protection. These safety features help protect against damage to your battery and ensure safe operation. 4. Easy to Use: Our lithium battery charger module is simple to understand and operate, making it easy for even novices to use. It requires no complex setup or installation and can be used with minimal effort. 5. Battery Overvoltage Protection: Our Li-ion charger has a built-in battery overvoltage protection feature, which helps prevent damage to your battery caused by overcharging. This feature helps prolong the life of your battery and ensure its continued reliability.