[JonCage]

I now have a 10 year old AGM DEKA and it shows no signs of slowing down.

[snowball]

I don't know what you use the battery for, but if it is essential for you to get back to shore. I might suggest that you invest in a second battery as a stand-by. Just in case you need it.

[rebuilder]

other than that, I know nothing about batteries

[eurekafag]

I invested in a portable battery pack this year. it has 2 x 12V dc plugs on it, and a USB plug as well. It also has theb ooster cables. I paid $69 for it at canadian tire on sale (50% off)

[nofuture]

I usually get 4-5 years out of them here in MI, before they start to go bad. Same with Truck batteries. Just replaced 3 Optima Marine batteries, 3yrs on them light usage. Might be differant done south.

[Galuel]

That question will depend on your location climate. here

[gef]

Although we won’t go into the specifics of batteries (AGM’s, flooded, etc).

[Solego]

Or you can use this link here for our recommendation of a load tester from Amazon!

[andy]

Read this article here if you are unsure about How Many Batteries Should Your Boat Have? [links]

[bdonlan]

New technology includes Deep Cyle AGM (Absorbed Glass Mat) batteries; these are built much differently. They utilize an ultra-fine glass mat between two plates, they’re heavier for deep cycle batteries and they’re saturated in battery acid and are practically immune to vibration issues. more

[Ewald]

Be sure to pick the best charger for your particular type of battery. I recommend a smart charger that shuts down to a trickle when batteries are fully charged.

[r!chb]

As a general rule, most batteries with heavy use will last approximately three years. Part of owning a boat is managing and maintaining a log of each battery’s purchase date and age.

[GeorgeH]

CCAs measure current flow when starting an engine. The higher the number, the more amps it will deliver to crank the engine.

[geekmug]

The following guide and reviews will explain the most important factors for picking a top rated marine battery for your boat or watercraft.

[tuxsoul]

Looking at the specifications of our selection above, you’ll see that the deep cycle only models just about service this minimum, whereas the starter batteries feature a much righter rating. [links]

[jarlethaanthonyt]

Here are a few things you can do to extend the life of your battery: [links]