3S12V8A 18650 Lithium Battery Protection Board HX-3S-03

The HX-3S-03 protection board is designed to ensure the safety of lithium-ion (Li-Ion or Li-Po) battery packs configured in a 3S series arrangement (3 cells). It protects your 18650 accumulators from overvoltage charging, undervoltage discharge, and short circuits, ensuring optimal lifespan and safe operation for your electronics projects.

This module is ideal for building custom battery packs intended to power drones, cordless tools, e-bikes, or home energy storage systems. It is placed between the cells and the charger/discharger to cut off the circuit in case of malfunction.

Specifications

• Model: HX-3S-03
• Charging Voltage: 12.6 V to 13 V
• Overcharge Voltage Range (per cell): 4.25 V to 4.35 V ± 0.05 V
• Under-voltage Discharge Range (per cell): 2.3 V to 3.0 V ± 0.05 V
• Max Operating Current: 6 A to 8 A
• Peak Current: 9 A to 10 A
• Quiescent Current (Leakage): < 30 µA
• Internal Resistance: < 100 mΩ
• Operating Temperature: -40 °C to +50 °C
• Storage Conditions: -40 °C to +80 °C
• Lifespan: > 30,000 hours
• Short Circuit Protection: Yes, with auto-recovery delay
• Dimensions: 30 × 30 × 2.8 mm