High-Capacity 21700 Lithium Battery – 4000mAh Powerhouse for Professional Tools
Premium 21700 lithium battery with ultra-high 4000mAh capacity, engineered for extended runtime in high-drain devices. Features advanced Li-ion cell technology for stable voltage output and minimal self-discharge. Precision-crafted with a durable steel casing and built-in safety protections including overcharge/overheat prevention. Ideal for high-performance flashlights, garden power tools, and industrial handheld equipment. Optimized for bulk purchases with wholesale pricing—direct from factory to global buyers. Unmatched value for professionals requiring reliable, long-lasting power solutions.