As industrial application experts, we understand the frustration when vital equipment fails during critical field operations. Traditional lithium batteries frequently trigger low-temperature shut-offs or suffer catastrophic capacity drops at sub-zero levels. That is why our technical team developed this industrial-grade, high-capacity NiMH Sub-C 4S1P stick pack. Utilizing mature 1.2V 4000mAh nickel-metal hydride chemistry, this robust 4.8V/19.2Wh power pack maintains an internal resistance ≤15mΩ, ensuring stable and reliable energy delivery. Physically structured in a linear, four-cell arrangement measuring Φ23.5mm * 174.0mm, it is meticulously wrapped in a premium matte black, wear-resistant, flame-retardant industrial PVC sleeve. This streamlined layout perfectly fits the long-handle grip cavities of railway track maintenance lamps, power inspection flashlights, and anti-drop heavy-duty work lights, providing an exceptional grip center of gravity for frontline workers.