This is a replacement battery for YTX20L-BS, FAYTX20L-BS, PTX20L-BS, CB18L-A, PTX20LBS-FS, WPX20L-LS, MBTX20U, ETX20L and GTX20L-BS. The SigmasTek STX20L-BS motorcycle battery is AGM Maintenance Free, fully charged and ready to install. The motorcycle battery offers optimal cranking amps, superior performance and is designed for motorcycle and power sports units, where high power output is required over short periods of time. The STX20L-BS motorcycle battery comes with 6 months warranty.