HKD 4S 15A Lithium Battery Charger Protection Board with Heatsink

The HKD 4S 15A Lithium Battery Charger Protection Board is designed for 4-cell (4S) lithium-ion or 18650 battery packs, with a nominal voltage of 14.4V-16.8V. This module ensures reliable battery management with multiple safety features including overcharge, over-discharge, overcurrent, and short-circuit protection. With built-in automatic recovery, the board resets itself without requiring charger activation, making it more user-friendly and efficient.

Equipped with a heatsink for enhanced cooling, this module supports continuous operation at up to 15A and peak loads up to 30A, making it suitable for DIY battery packs, e-bikes, power banks, and other high-current lithium-ion applications.

Features:

• Designed for 4S (4-cell) 18650 lithium-ion battery packs
• Provides overcharge, over-discharge, overcurrent, and short-circuit protection
• Automatic recovery after fault condition (no charger activation required)
• Includes heatsink for improved heat dissipation
• Compact design, easy integration into battery packs

Specifications:

• Battery Configuration: 4S (14.4V / 14.8V / 16.8V lithium battery group)
• Working Current: 15A (natural cooling 10A, with heatsink 15A)
• Maximum Instantaneous Current: 30A
• Overcharge Detection Voltage: 4.25 0.025V
• Overcharge Release Voltage: 4.15 0.05V
• Over-discharge Detection Voltage: 2.50 0.08V
• Over-discharge Release Voltage: 3.00 0.1V
• Overcurrent Protection: 20-30A
• Operating Temperature: -40 C to +85 C
• Dimensions: 50 × 22 × 4 mm

What's in the box
1 x HKD 4S 15A Lithium Battery Charger Protection Board with Heatsink