Ever wonder why it's hard to get even two seasons out of a boat battery? It's because you run it low and have to charge it back from zero. Standard flat-plate lead acid batteries can stand only 50 or so full discharges without losing most of their power. The new spiral-cell Blue Top batteries from Optima are built to withstand the vibration of boating and recover from full drawdown to near-new capacity up to 350 times, the manufacturer says. The sealed batteries won't leak, and we like the threaded terminal studs that give a flawless connection.
From $200; optimabatteries.com
