BikeMaster and Yuasa batteries are made using the same construction techniques.

Maintenance Free

• Comes with pre-measured acid tubes that dealer easily empties into battery.  Includes a seal that is then placed across top of battery to create sealed, spill-proof battery.  Never needs refilling but may need periodic charging.  6-month mnaufacturer's warranty
  

BikeMaster Platinum High Performance Sealed Batteries

• Completely sealed and maintenance free. This design eliminates the need to add water and prevents corrosion and acid spills on expensive paint and chrome
• The lack of free electrolyte reduces resistance and produces 25% more cranking amperage
• Made to hold up to extreme amounts of heat and vibration
• Liquid-free, flexible design allows you to mount the battery in almost any position (inverted not recommended)
• Increased shelf-life. 2% monthly self discharge rate means a bike can sit for an extended period of time without constantly monitoring it with a battery charger
• 1-year manufacturer's warranty