These batteries are for use on the EZee Rover Scooters only. It's recommended that scooter batteries be replaced in pairs.While both your old batteries may not fail at the same time if one fails the other won't be far behind. Pairing a new battery with an older battery may damage the new battery and significantly reduce its performance and lifespan.Power RatingWe offer high powered 26 amp hour batteries for our Rover scooters for long lasting performance between charges. Batteries for these scooters are sold in pairs. If you order 1, you will receive 1 pair.Batteries are non-returnable