Model: IFR26650 Capacity: 2500mAh Weight: 78g Size: D×H = 26.0±0.2×65.0±0.5 Inner Resistance: <15mΩ Order   Model: IFR18650 Capacity: 1200mAh Weight: 41g Size: D×H = 18.0±0.2×65.0±0.5 Inner Resistance: <50mΩ Order