Check the listing for details. 2/4/6PCS Type-C/Micro USB 2S 3S 4S BMS 18W 2A Li Li-ion Battery Charging Module. Condition: New. Listed at 13.88 USD. Product features:This product is a wide application, multi-innovative application design module, has been maturely applied to high-power rechargeable battery applications, with a boost mode of charging.Support multiple strings of lithium batteries charging, regardless of the input voltage is higher, lower or equal to the battery voltage can be charged to the battery.Built-in fast charging input protocol, battery charging is divided into three stages: pre-charge, constant current and constant voltage process.Supports fast charging with a wide voltage input of 4.5V-15V and 1-4 string battery charging.Charging voltage can be set via resistors to support multiple strings of lithium batteries Parameter description:1:Small size, high power, 3A high current, power up to 18W (not exceeding this power).2:4.5-15V power supply, can be used for 1-5 strings of Li-ion/Li-polymer boost charging.3:Adaptive charging current adjustment for all USB port charging.4:Built-in input fast charging protocol, can be configured with 9V or 12V input protocol.5:Intelligent pre-charge, constant current, constant voltage with short circuit protection.6:Automatically works in boost or buck mode charging according to input voltage and battery voltage changes.7:3-colour LED charging status indication indicates charging, full and fast charging.8:Operating ambient temperature range:-20℃～85℃.9:Use range:Multi-string lithium charging high power rechargeable battery conversion solar charging10: Multiple specifications:2 string full 8.4V3 string full 12.6V4 strings full 16.8V Usage:Module input can be micro USB interface, type-c interface, or one of the direct solder wire, voltage at 4.5-15V, battery according to the resistor R1 and R2 settings, can be 1-5 strings are lithium batteries or lithium iron phosphate batteries, the battery should be with a protection plate, can automatically equalize the voltage is better. If the input is used for fast charging, two strings can be set to 9V input, more than 3 strings set to 12V input, of course, no setting is also possible.Introduction to other charging voltage settingsAs the module supports a wide range of charging, the module only provides a few common charging configurations, if you need other charging configurations, you can change the R1 and R2 resistors to configure them yourself, the charging cut-off voltage can be calculated using the following formula. Caution:*Do not reverse the connection of the battery, or burn the board.*Before connecting the battery, connect the charging head and test whether the module charging light shows normal.*The wire must not be too thin, the charging current can not keep up, the wire must be soldered.*The battery must have a protection plate.*Module power when the heat will be larger, pay attention to fan heat, do not use not easy to heat are material sealed module. Package include:2/4/6X modules On Nov 29, 2024 at 00:15:12 PST, seller added the following information: