Battery Configuration

4S (4-series) Li-ion/Li-Po (13.2V–16.8V)

Nominal Voltage

14.8V (3.7V/cell)

Full Charge Voltage

16.8V (4.2V/cell)

Max Continuous Current

40A (Peak may vary)

Balance Function

Yes (Passive balancing)

Overcharge Protection

4.25±0.05V per cell

Over-Discharge Protection

2.5±0.08V per cell

Overcurrent Protection

Yes (Adjustable via resistors, typically 40A–80A)

Short-Circuit Protection

Yes (Auto-recovery)

Temperature Protection

Optional (NTC thermistor support in some models)

Cell Balancing Current

~30mA–50mA (Passive balancing)

PCB Size

Varies (~50mm x 35mm typical)

Wire Gauge Support

10–12AWG (for high-current terminals)

Compatible Batteries

18650, 21700, Li-Po packs (4-series)

Applications

Drill motors, RC cars, e-bikes, solar storage