TOP 2: BUDGET PICK! In classic applications, valve-regulated gas recombinant technology may provide up to three times the cycle life of ordinary auto batteries. Absorbed glass mat (AGM) technology is maintenance-free and requires no water, spills, leaks, or upkeep. For off-season storage, calcium positive and negative, full-frame power route grids provide larger cranking amps and lower self-discharge rates. prevents acid damage and final dry-out. PROS🟢 The longest life cycle full-frame power path grids for lower self-discharge rates CONS🔴 Bulky option