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The INR 18650 is a type of lithium-ion rechargeable battery that uses a lithium nickel manganese cobalt oxide (NMC) cathode material. The "INR" designation indicates this specific chemistry.Key characteristics of the INR 18650 battery:Capacity: Typically ranges from 2200 mAh to 3000 mAh, with common capacities being 2500 mAh and 3000 mAh.Voltage: Nominal voltage of 3.7V.Dimensions: Diameter of 18 mm and length of 65 mm.Weight: Approximately 45 grams.Discharge Rate: Can discharge at high rates, with the Samsung INR18650-25R rated for 8C discharge.Brands: Major brands include Samsung (INR18650-25R and INR18650-30Q) and DMEGC (INR18650-26E).