The majority of us are aware that the batteries included when purchasing a new or used boat may not always be of the highest caliber. We don't give them much thought if they appear to perform their function. However, in hotter regions, ordinary heat is a battery's worst enemy and can significantly reduce its lifespan. How the battery is treated during this time is also crucial to extending its life in regions of the country where we are required to store boats for the winter. - car battery replacement
The best way to maintain charge while not in use is to keep batteries on a regulated "trickle" charger. If a battery is not charged (and kept charged), it may freeze in cold weather, which could lead to a cracked case. Use it or lose it applies to many things in life, including batteries! Because a car is used frequently and the battery is kept charged, it typically lasts longer than a boat battery.
The proverbial "two years is all a battery needs" holds true a lot of the time when it comes to boats. When it's about to fail you, you'll typically get a warning, such as a "dead" battery one morning or a little slower cranking speed than usual. The battery miraculously comes to life when you plug in the charger, and you can then leave for your trip. You might believe that a light was left on or that the voltage was decreased by the radio memory. The battery may actually be sulfating, having warped plates, and not taking or holding a charge as well as it once did.
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