Shop SpinLife for a complete selection of replacement scooter batteries. Our batteries are backed with a 110% low price guarantee and the best return policy on the web. Choose from Interstate and MK Batteries . Some of our best selling batteries include the MK U-1 Sealed Gel Pair and the Interstate 12V 12 AH Sealed Lead Acid Pair. If you are looking for battery chargers, click here to see our selection of chargers for scooters and power chairs from brands like Pride, Drive, Invacare and MK.