ICR 18650 Blue Lithium-Ion Rechargeable Battery - 3.7V 2600mAh This high-capacity ICR 1860 3.7V 2600mAh rechargeable Lithium battery cell is perfect for solar science fair projects involving panels. Also great for building an off-grid solar power system for camping, RVs, or boats. This popular lithium ion cell battery is also frequently used in household appliances, doorbell cameras, and more. Use it in any device that requires a standard 18650 Lithium battery cell. Specifications: ICR 18650 battery - rechargeable Lithium Voltage: 3.7V Rechargeable Capacity: 2600mAh (2.6Ah) Power: 9.62 Wh Material: Li-ion Battery size: 67 mm (2.63 inch) long, 18 mm (0.71 inch) diameter