Battery set, compatible with: E200 (version 8-12)E300 (version 5-10 & 12) Razor Part #W13112430003 Note: Model versions can be determined based on the product ID code on your Razor product. The product ID code can be found on the battery cover and/or on the bottom of the frame. The 7th and 8th numbers in your product ID code are the version number of your Razor product (e.g. "01" = Version 1, "02" = Version 2, etc.).