This is a replacement battery for YTX20H, WPX20-BS and GTX20H-BS. The SigmasTek STX20H-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 STX20H-BS motorcycle battery comes with 6 months warranty.