Teyleten Robot 2S BMS 15W 8.4V 12.6V 1.5A Lithium Battery Charging Boost Module with Balanced Support Fast Charge with Indicator Type-C 5pcs — Open-Box, 33% Off

1. Supports QC fast charging

2. 15W synchronous switch boost charging

3. Boost charging efficiency: 94%

4. Configurable for 2-cell or 3-cell lithium battery charging

5. 2-cell balanced charging

6. Adjustable charging current

7. Input overvoltage and undervoltage protection

8. Adjustable charging timeout protection;9. Output overcurrent, overvoltage, and short-circuit protection

10. Battery charge cut-off voltage setting: Default 4.2V per cell (standard for most batteries, no adjustment needed). To modify, refer to the RVSET setting table and adjust the board's VSET resistor.

11. Charge timeout duration setting: Default is no timeout. Set via ROT resistor value: 68K - 4 hours, 120K - 12 hours, No resistor - 24 hours. NTC Integration: Not used normally. If required, change NTC resistor value to 82K. Connect a 100K thermistor (B=4100) between the NTC solder point and adjacent GND. LED Indicators: - Red LED: Steady on during normal operation - Blue LED: Illuminates during charging - Blue LED: Turns off when fully charged - Blue LED: Flashes when an anomaly is detected

This module is suitable for 3.7V lithium batteries in 2-cell or 3-cell configurations. Short-circuit settings enable default 2-cell operation. When using 2 cells, the built-in battery balancing function is highly practical. Input options include Type-C port or soldered wires. When connected to a Type-C fast-charging power source, the module automatically adjusts charging voltage for enhanced efficiency. For soldered wire input, the input voltage must be lower than the battery voltage; otherwise, the module will only operate in boost mode. Input: Selectable Type-C port or solder wire input. When connected to QC fast charging via Type-C, it automatically adjusts the charging voltage to improve efficiency. For solder wire input, the input voltage must be lower than the battery voltage (battery voltage × number of series cells). Output: Supports 2-series and 3-series configurations. Batteries require a protection board. To switch from the default 2-series to 3-series, short the shorting points and remove the adjacent resistor. The balancing function is available for 2-series configuration. Connect the BM pin between the two series batteries (note: balancing speed is limited; ensure consistent parameters between series batteries when using this feature). Current Settings: The green arrows in the diagram indicate the current settings for two parallel circuits. Default values are 100K (0.9A) and 180K (0.5A). Resistors can be removed or replaced as needed. Current calculation formula: Current = 90000 / Resistance Value.