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Round compact design (17.5mm diameter) optimized for cylindrical battery configurations
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Integrated protection against overcharge, over-discharge, overcurrent, and short circuit
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Long operational lifespan of over 50,000 hours
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Short circuit protection with automatic recovery after charging
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Ultra-low quiescent current consumption
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High reliability and performance in wide operating temperature conditions
Specifications
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Model: HX-2S-A2
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Battery Configuration: 2S (7.4V nominal)
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Charging Voltage: 8.4V–9V
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Overcharge Voltage Range: 4.25V–4.35V ± 0.05V
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Over-discharge Voltage Range: 2.5V–3.0V ± 0.05V
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Continuous Operating Current: 5A
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Peak Instantaneous Current: 7A
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Quiescent Current: <10µA
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Internal Resistance: <300mΩ
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Operating Temperature: -40°C to +50°C
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Storage Temperature: -40°C to +80°C
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Size: 17.5 × 17.5 × 3.2 mm
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Effective Life: >50,000 hours
Connector Description
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B+: Connect to battery positive terminal
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B−: Connect to battery negative terminal
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MB: Connect between the first and second battery (mid-point tap)
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P+: Positive terminal for both charging and discharging
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P−: Negative terminal for both charging and discharging
Important Notes
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This protection module is not suitable for use with:
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Lithium iron phosphate (LiFePO4) batteries
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High-drain applications like hernia lamps, hand drills, electric bicycles, fish machines
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Motors drawing >4A (e.g., 775 motors), or high-power LEDs (e.g., 1W fish-eye LEDs)
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Batteries must be in good condition—excessive heat indicates the battery is incompatible or defective
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Do not continue use if the battery heats up during operation to avoid damage or failure
Applications
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2-cell 18650 lithium-ion battery packs
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Portable low-power devices
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DIY electronics and robotics
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Low-power LED systems
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Battery-powered instruments and toys
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Wearable or compact embedded electronics