RV And Marine Batteries
When considering the vast selection of RV and Marine batteries available on the market, we may want to clear up some confusion that can arise in the terminology of classifying the types of batteries that are out there.
Let's look at three classifications of batteries: starting batteries, deep cycle batteries, and marine batteries. First, starting batteries primarily do what their name implies, they are used to start and run an assortment of engines. This task requires a very large current, but for a very short duration. Second, the deep cycle battery is the kind normally found on a golf (or any other electric-powered) cart and it is designed to deliver current over a long period of time (for instance, the time it takes to play a round of golf). Third, marine batteries are often looked at as hybrid batteries that can combine the kicking-over power of a starting battery with the ability to deliver the sustained levels of current expected from a deep-cycle battery.
Both marine and RV batteries have similarities, so it's no wonder that we find that many of the better known battery manufacturers offer both. As with any product, battery brands have their strengths to look towards.
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For instance, Optima's marine batteries and deep-cycle marine batteries are produced by a company that's also well-known for their Optima RV batteries, their camping, motorcycle, and heavy equipment batteries. They also make batteries for classic and antique cars. Everstart marine batteries are moderately priced and are marketed by WalMart. Exide marine batteries offer their Orbital Marine Starting Battery and their Stowaway Marine Deep Cycle Battery, as well as a deep cycle RV battery. Interstate, well-known for their auto and mower batteries, also offers their Interstate Marine Battery and their own RV model. Sonnenchein Marine Batteries come from the same company that is well known for their emergency lighting batteries, while Delco Voyager marine batteries are from one of the best-known names in batteries.
While this isn't a recommendation for a specific brand (because there are plenty to choose from), here's a word of caution about cheap marine batteries. You get what you pay for. Seemingly inexpensive bargain batteries often have much shorter life-spans than trusted name brands do, because the name brands are generally better engineered. And another tip: when it is time for charging marine batteries, a small low-amp charger will usually do the trick just fine.
By the way, a great resource for getting other people's opinions on these matters is to look up the RV batteries forums, the DIY forums, and the fishing forums. There's a wealth of good advice out there waiting to be mined!