HKD 3S Lithium Battery Charger/Protection BMS Board 25A

The HKD 3S Lithium Battery Charger/Protection Board (25A) is designed to safely charge and protect 3-cell lithium battery packs (including 18650 and other Li-ion cells). This smart BMS ensures each cell is charged independently with automatic cutoff when full, while also providing short-circuit, over-voltage, and under-voltage protection.

With a maximum continuous current of 25A and transient peaks up to 40A, it is suitable for high-power applications such as e-bikes, drills, and other DIY rechargeable battery projects. Reliable and efficient, this protection board helps extend the service life of your batteries while ensuring safe operation.

Specifications:

• Size: 56mm × 45mm × 1.2mm
• Over-voltage protection: 4.25 ~ 4.35V 0.05V
• Over-discharge protection: 2.3 ~ 3.0V 0.05V
• Maximum Operating Current: 0 ~ 25A
• Maximum Transient Current: 34 ~ 40A
• Quiescent Current: <30 A
• Internal Resistance: <100m
• Working Temperature: -40 to +50
• Storage Temperature: -40 to +80
• Effective Life: >30,000 hours
• Short-circuit Protection: Yes, delayed self-recovery

Features:

• Designed for 3-cell 18650/Li-ion rechargeable batteries
• Separate charging function for each cell
• Automatic shutdown when fully charged
• Built-in over-voltage, under-voltage, and short-circuit protection
• High current handling up to 25A continuous
• Compact, lightweight, and durable design

What's in the box
1 x HKD 3S Lithium Battery Charger/Protection BMS Board 25A