18650 2-Cell Battery Packs – Series & Parallel Customization
Premium-grade 18650 lithium-ion cells ensure high energy density (2500mAh-3500mAh options) and stable discharge rates (20A max). Robust nickel-plated steel connectors and high-temp PVC sleeves prevent corrosion and short circuits, with precision spot welding for minimal resistance. Customizable series (7.4V) or parallel (3.7V) configurations—ideal for DIY power banks, drones, flashlights, and solar storage systems. Bulk pricing available—wholesale discounts for orders above 50 units. Globally compliant (UN38.3, CE, RoHS). Fast bulk shipping from our warehouse network. No middlemen—factory-direct pricing guaranteed.