Application: Motor power is between 200W-500W,,ebike bicycle ,electric scooter,electric skateboard,power wheelchair Specification : Rated voltage: 24V Output Voltage: 21-29.4V Combination mode: 7 series 3 parallel Number of batteries: 21 cell Single cell size: 18mm diameter x 65mm height Battery capacity: 9Ah Dimensions: 65x68x130mm (Can customized ) Total weight: 1kg around Internal protection circuit: overload, over discharge, over current, short circuit protection Battery weight: about 1100g Battery cells inside : Big brand cells . Good quality! Life Cycles :Over 1000 times Applications: electric vehicles, model aircraft, electric tools, Battery pack diy, Golf carts, sightseeing coaches, electric Motorcycles, electric bicycles ,power wheelchairs And Others . Note: If the motor power is more than 500W, please contact us via email, we can customize the matching battery for you, but you need to charge extra!