RMB Turbo batteries will upgrade your Protean, Mult-Point, e Quad 500w or Flex 500 scooters. Increases range and increases life by approximately 130 more charges compared to the standard OEM pack. Both standard OEM batteries and Turbo batteries are high quality manufactured by the same manufacturer. RMB Turbo battery pack is a set of 4 sealed lead acid 12v, 13.2AH individual batteries-- Besides increased amp hours, the Turbo batteries have an internal structure that holds up better under hotter climates and increases the amount of charges it can take over its life.