LFX Duration batteries are recommended for those who want the strongest possible cranking performance and lifespan Ultra light. 1/5 the weight of lead-acid batteries on average Zero sulfation, for longer service life Holds unloaded charge for one year without maintenance Drop-in replacement for your OEM battery Military spec carbon composite case Faster cranking for better starts Super-fast recharge rate No explosive gasses during charge, no lead, no acid Environmentally friendly, just discharge and dispose; Japanese engineering; 3-year manufacturers warranty