U.S. Parts Outlet via eBay offers the Optima RedTop 34/78 Automotive Starting Battery
, model no. 8004-003, for $155.56
with free shipping
charges pennies more.) That's the lowest total price we could find by $14, although we saw it for $31 less last fall. This battery purports to have the strongest 5-second starting burst, to last up to twice as long as normal car batteries, to recharge faster, is completely spillproof, and can withstand 15x more vibration than a normal battery. It's meant for trucks, SUVs, luxury cars, hot rods, and off-road vehicles that require more power.