In underground coal mining shafts, offshore oil rigs, and volatile chemical storage units, lighting tools cannot afford a single spark or thermal anomaly. Designed specifically for explosion-proof headlamps, fire-safety handlamps, and heavy industrial inspection lights, the HiMAXBATT 3.2V 3600mAh battery pack utilizes premium lithium iron phosphate (LiFePO4 / LFP) chemistry. LFP inherently possesses superior thermal and chemical stability compared to traditional cobalt-based chemistries, remaining non-flammable even under severe physical penetration or elevated ambient temperatures up to +60°C. Configured in a 1S2P cell topology with mature LFP 18650 cells (3.2V 1800mAh each), this battery pack maintains a rock-solid 3.2V nominal discharge platform and delivers 11.52Wh of usable energy. To strictly meet intrinsically safe (Ex ia/ib) design criteria, the pack limits its maximum continuous discharge current to 1.0A (approx. 0.28C rate). This engineered current limit restricts internal resistance heating (I²R losses) to less than 0.05W during full-load illumination, keeping external surface temperatures well below critical T4 auto-ignition thresholds even under sustained operation.
Harsh field environments demand physical endurance beyond ordinary commercial standards. Encased in a custom high-visibility yellow ABS+PC flame-retardant injection-molded housing measuring 75.0mm × 40.0mm × 22.0mm and weighing just 115g, the HiMAXBATT pack incorporates internal vibration-damping silicone pads that cushion internal cells against high-frequency shocks. The top cover is sealed using precision ultrasonic welding, achieving an IP68 ingress protection rating against prolonged underwater submersion and fine coal dust penetration. For electrical connectivity and safety, the pack features a flame-retardant JST-XH-2P output terminal integrated with an analog NTC thermistor for real-time thermal monitoring, paired with dual redundant hardware current-limiting circuits that immediately clamp short-circuit currents. Every production batch undergoes rigorous safety validation, including nail penetration without flame or smoke, MIL-STD-810G high-frequency vibration testing, and IP68 water immersion. Fully certified to UN38.3 and manufactured under ISO9001 quality systems while meeting IEC 62133-2 standards, this battery pack offers industrial safety procurement managers an uncompromised, customizable power foundation.
Specifications
3.2V 3600mAh LFP 18650 Battery Pack
Product Brand
HiMAXBATT
Model Number
HMX-LFP18650-1S2P-3.2V3600
Chemistry
Lithium Iron Phosphate (LiFePO4 / LFP)
Cell Specification
LFP 18650 (3.2V / 1800mAh)
Topology / Array
1S2P (1 Series, 2 Parallel)
Nominal Voltage
3.2 V
Nominal Capacity
3600 mAh (3.6 Ah)
Stored Energy
11.52 Wh
Charge Cut-Off Voltage
3.65 V
Discharge Cut-Off Voltage
2.0 V
Max Continuous Discharge
1.0 A
Intrinsic Protection
Dual Redundant Hardware Limit Circuits
Thermal Telemetry
Analog NTC Thermistor (10kΩ B=3950K)
Output Terminal
JST-XH-2P Terminal
Enclosure Material
Flame-Retardant ABS+PC Injection Shell
Shock Isolation
Integrated Molded Silicone Cushion
Dimensions
75.0 mm × 40.0 mm × 22.0 mm
Total Weight
Approx. 115 g (±5g)
Ingress Protection
IP68 Rating
Frequently Asked Questions
Navigating battery selection for explosion-proof lighting and hazardous location equipment requires evaluating intrinsic safety standards, thermal limits, and physical durability. Below, our senior battery application engineers address five critical questions commonly raised by B2B procurement managers and safety engineers when specifying the HiMAXBATT 3.2V 3600mAh LiFePO4 battery pack.
How does the HiMAXBATT 3.2V 3600mAh battery pack comply with intrinsic safety (Ex ia/ib) requirements for mining and gas environments?
Intrinsic safety requires that under both normal operation and fault conditions, electrical energy and surface temperatures remain below levels capable of igniting explosive atmospheres. Our pack achieves this through three complementary safeguards: LFP chemistry provides intrinsic thermal breakdown protection; dual redundant hardware current-limiting circuits immediately clamp fault currents; and operating at a 1.0A max discharge keeps continuous heat generation below 0.05W, preventing localized thermal buildup.
Why is LFP (LiFePO4) chosen over conventional Li-ion NCM for explosion-proof headlamps and handlamps?
While NCM offers higher energy density, LFP provides unmatched safety and thermal stability. LFP withstands temperatures up to 300°C–500°C before experiencing thermal breakdown, compared to ~200°C for NCM. In physical impact or nail penetration tests, LFP releases no oxygen, preventing thermal runaway. Furthermore, LFP delivers over 2,000 cycles (80% DOD), significantly reducing battery replacement cycles in underground mining operations.
How does the custom ABS+PC enclosure and ultrasonic welding enhance durability in underground mining shafts?
Underground equipment is subject to severe drops, vibrations, and liquid/dust exposure. Our custom yellow casing blends ABS (for impact toughness) with PC (for high flame retardancy and heat resistance). Built-in silicone damping pads isolate internal cells from impact energy, while precision ultrasonic welding produces a hermetic IP68 seal, completely blocking water and abrasive coal dust.
What thermal performance can be expected when operating handlamps in extreme temperatures (-20°C to +60°C)?
The pack operates reliably from -20°C to +60°C. At -20°C, low-temperature electrolyte formulation maintains stable ionic conductivity, retaining over 70% nominal capacity without voltage drop. At up to +60°C, the internal analog NTC thermistor transmits real-time thermal readings to the host mainboard, enabling active thermal monitoring and safe continuous operation.
What certifications and custom options are available for OEM handlamp manufacturers?
The pack is UN38.3 certified, manufactured under ISO9001 quality management, and compliant with IEC 62133-2 standards. HiMAXBATT provides full OEM customization, including custom lead lengths, alternative wiring gauges, waterproof connectors (e.g., Hirose, Molex, IP67 circular connectors), modified NTC resistance values (e.g., 10kΩ / 100kΩ), and tailored outer dimensions.
