Product model: INR26650-4000mAh (DOS) Nominal capacity: 4000mAh Nominal voltage: 3.7V Cycle life: 0.5C charge 1.5C discharge 400cycles≥80% Maximum support discharge current: 1.5C Internal resistance: ≤40mΩ Diameter: 26.5mm Height: 66.3mm&67.0mm Weight: 90.5±2g Optional range of cap models: Explosion-proof valve caps