21700 Batteries by Application (Consumer Electronics, Automotive, Others), by Types (Lithium Cobalt Oxide (LiCoO2), Lithium Manganese Oxide (LiMn2O4), Lithium Nickel Manganese Cobalt Oxide (LiNiMnCoO2 or NMC), Lithium Iron Phosphate (LiFePO4), Lithium Nickel Cobalt Aluminum. 21700 Batteries by Application (Consumer Electronics, Automotive, Others), by Types (Lithium Cobalt Oxide (LiCoO2), Lithium Manganese Oxide (LiMn2O4), Lithium Nickel Manganese Cobalt Oxide (LiNiMnCoO2 or NMC), Lithium Iron Phosphate (LiFePO4), Lithium Nickel Cobalt Aluminum. The IFR 21700 battery is a high-performance lithium-ion cell with a standardized size of 21mm in diameter and 70mm in length. Known for its balance of energy density, thermal stability, and longevity, the 21700 format has become increasingly popular across electric vehicles, renewable energy. What is a 21700 Battery? A 21700 battery is a rechargeable lithium-ion cell with a cylindrical shape and standardized dimensions of 21mm in diameter and 70mm in length. 21700 battery is one of the most popular and commonly found cells in the battery pack in electric vehicles, battery-powered construction equipment, portable power cutting/ drilling tools, the emergency torch, flashlight, etc. It is in the 21700 cylindrical format. The diameter is given based on largest measurement at the top of the cell (Section A) Reference 1 has many continuous discharge curves for this cell from 0. 2A up to 20A. Approved by : INR21700-50E 5. Date of Application (YY/MM/DD) : 2018/07/11 6. Charge Current 4,900mA (not for cycle life) 3.