Those odyssey batteries look nice, but which one would you need for a 525?

Optima batteries are $315.00 and have a 4 year warranty. I think I am gonna run the optima. I have 2 batteries in case one ever fails.

Just don't buy a interstate. I had those just all out stop in a parking lot one day when I went to the bank.. No warning .. It just stopped and I could'nt get my truck to start with a jump either.. Had to go to the parts store right then and buy a new battery..

I've had the optima batteries for 4 yrs. I think ? And not one problem, when they get bad, I will replace them with the same batteries.

I bought my blue Marine Optima's from Costco, can't remember the exact price, but it was about $150-175 each.

I think Interstate makes Optima now.

I have 4 Blue tops in my boat, and so far I am having issues. Boat is going back to stereo shop to get at least 2 replaced under warranty. I have had them in the past and they have been fine.

If you want unstoppable batteries that you can play your 3000 watt radio on for an hour and still crank the engines Google these things!

KINETIK HC2000

They are the single best investment I have ever made on my boat - the things are just damn awesome!

Exactly. Otherwise, CCA and amp hours are numbers that don't lie. If they are the same, the batteries will perform the same.

Batteries die from bad charging/discharging habits. If you take care of a battery, it will last years, way more than 2.

Charge your batteries correctly, with a quality charger that has good output characteristics and charging strategies. Never drain a battery below 40%. Try to keep even above that. Add more batteries if necessary, I guarantee with proper charging and discharging they will last 4-5 years. This goes for any battery.

What happened to your battery was either two plates collided, or one of the internal connections broke. Optimas would prevent that. I used autozone's duralast batteries, they get good reviews and have a 2 year warranty. I don't see it worth spending the money on optimas. I never had luck with them.

This is exactly correct. Further, one of the most common reasons people have bad experiences with Optima speciffically is simply due to charging. They do not like to be blasted with amperage after a long continious drain such as a stereo. It also takes them longer to bounce back if charging with an alternator vs. a trickle low amp multi-stage. If you're gonna use them for both, stereo and starting, then fire up the engines several times through out your day and charge them for a short while. That's another way to help keep them above the killer low levels like mentioned above.

If you're at the sandbar all day long running a loud stereo and you only fire up the engine once for 5 minutes, they won't last long at all even though you were still able to crank over.