Would you be impressed if your battery was guaranteed to hold its charge for one year without maintenance? Shorai (which means "the future") lithium batteries are one-fifth the weight of lead-acid batteries yet offer two to four times the service life. The Japanese-made battery is a direct replacement for the OE stock battery, but offers better performance characteristics including: faster cranking for better starts, fast recharge rates and they're environmentally safe. All of this comes with a two-year warranty to boot.