Yuasa High Performance Maintenance Free Battery - YTX20CH-BS YUAM6220C (PLT-90) Additional plates inside battery provide up to 30% more power (cranking amps) than the Yumicron battery. Dealer fills battery from included acid tubes to create a sealed, spill-proof battery. Never needs refilling. High level of power (cranking amps) possible for todays big bikes. 1-year manufacturers warranty.