LiFePO4 1S 3.2V 25A BMS Protection Board

The LiFePO4 1S 3.2V 25A BMS Protection Board is a compact protection module for single-cell lithium iron phosphate batteries. It guards the cell against overcharge, over-discharge, overcurrent, and short circuits, helping extend battery life and keeping DIY power projects safer. With a 24A continuous current rating, it suits high-drain loads such as LED lighting, small motors, flashlights, and backup power builds.

One board looks after one 3.2V cell. It cuts off charging when the cell voltage rises too high, disconnects the load when the cell drops too low, and shuts down the output when current spikes beyond the overcurrent limit. At just 50 x 25 x 3.5mm, the slim board fits easily into battery holders, enclosures, and custom packs.

Connect it following the pad markings on the board, and always check polarity before powering up. This board is designed for LiFePO4 cells only, so do not use it with standard Li-ion or LiPo cells, and note that it does not balance cells.

Specifications:

• Battery Type : LiFePO4 (Lithium Iron Phosphate)
• Cells : 1S (3.2V Nominal)
• Continuous Current : 24A (25A Rated)
• Overcurrent Detection : 42A
• Overcharge Detection Voltage : 3.75V ±0.25V
• Overcharge Release Voltage : 3.45V ±0.25V
• Over-Discharge Detection Voltage : 2.1V ±0.05V
• Protections : Overcharge, Over-Discharge, Overcurrent, Short Circuit
• Board Size : 50mm x 25mm x 3.5mm