21700 Battery 3.7V 5000mAh Lithium-ion Rechargeable Cylindrical Battery
High-capacity 5000mAh lithium-ion cell delivers long-lasting power for demanding applications. Premium-grade Li-ion chemistry ensures stable voltage output (3.7V nominal) and minimal self-discharge. Precision-engineered steel casing with built-in safety vents for overcharge/overheat protection. Ultra-durable 21700 cylindrical design (21mm diameter x 70mm height) fits flashlights, vaping devices, solar storage, and power tools. Factory-direct wholesale pricing with bulk discounts. Worldwide shipping. Strict quality control meets CE/RoHS standards. Ideal for OEM replacements or DIY electronics projects requiring reliable rechargeable energy.
Key Applications:
High-lumen torches, electric bikes, portable medical devices, backup power systems, industrial equipment.