... use any object shape Specifications: 1. Typical Capacity: 4000mAh 2. Cell Outer Dimension: 15mm (T) x 35mm (W) x 130mm ... Current(Max.): 60A 11. Discharging Current (Max. ): 80A 12. Cell Internal Resistance (25degrees): <180mΩ 13. Weight(approx.): 200g Application: ... Widely used for electric toys, rc models, such as model aircrafts, rc planes, rc boats, rc guns, rc helicopter... ...