logic
20+ Year Contributor
- 921
- 35
- Jun 11, 2002
-
Berkeley,
California
Hi,
I've been doing a little battery research. I've settled on Optima, based on comments I've seen regarding them and the fact that they're a sealed setup. I'm now looking at the various versions of batteries that they produce, and I've noticed very little difference (from reading over their techinical specifications) between their various "colors" (red for engine use, blue for marine, yellow for deep cycle applications). For reference, here are links to the specs they publish for each major type of battery:
The "Red Top 34" engine starter battery:
http://www.optimabatteries.com/products/pdf/34.pdf
The "Blue Top 34" dual-terminal marine starter battery:
http://www.optimabatteries.com/products/pdf/34M.pdf
The "Yellow Top 34" dual-terminal deep cycle battery:
http://www.optimabatteries.com/products/pdf/D34.pdf
My question, then, is simple: what's the difference, besides packaging? The marine battery literature makes claims about not discharging as much over time and recharging faster, but that would seem to be about it between the red and blue (the yellow has a few obvious differences, such as resistance and power output). Am I misreading, or is there really very little real-world difference?
For the curious: the reason I'm asking is because I'd like to be able to run the blue-top to match the rest of the underhood setup (along with any advantages that might come from the discharging characteristics; it sounds like the perfect setup for a car that's stored over winter, for example). That's the kind of eraser-head riceboi I am.
(I was a little unsure of whether to post this in the Basic/Newbie forum, or in the 2.0 Turbo Performance forum. Mods, please feel free to move if you think this is too basic.)
I've been doing a little battery research. I've settled on Optima, based on comments I've seen regarding them and the fact that they're a sealed setup. I'm now looking at the various versions of batteries that they produce, and I've noticed very little difference (from reading over their techinical specifications) between their various "colors" (red for engine use, blue for marine, yellow for deep cycle applications). For reference, here are links to the specs they publish for each major type of battery:
The "Red Top 34" engine starter battery:
http://www.optimabatteries.com/products/pdf/34.pdf
The "Blue Top 34" dual-terminal marine starter battery:
http://www.optimabatteries.com/products/pdf/34M.pdf
The "Yellow Top 34" dual-terminal deep cycle battery:
http://www.optimabatteries.com/products/pdf/D34.pdf
My question, then, is simple: what's the difference, besides packaging? The marine battery literature makes claims about not discharging as much over time and recharging faster, but that would seem to be about it between the red and blue (the yellow has a few obvious differences, such as resistance and power output). Am I misreading, or is there really very little real-world difference?
For the curious: the reason I'm asking is because I'd like to be able to run the blue-top to match the rest of the underhood setup (along with any advantages that might come from the discharging characteristics; it sounds like the perfect setup for a car that's stored over winter, for example). That's the kind of eraser-head riceboi I am.

(I was a little unsure of whether to post this in the Basic/Newbie forum, or in the 2.0 Turbo Performance forum. Mods, please feel free to move if you think this is too basic.)


Im having that go on right now with my Yellowtop D16, its a Honda Civic battery, being used in a trunkmount setup. The car sat all winter until June, which is when I got my new motor running. I can charge it, it "appears" to take a full charge in what seems to be about a third less charging time than usual, which means its probably discharging 10X faster than it should. I cant start the car warm without a jump. Im having hell getting it replaced by Advance Auto right now because they're testing it on one machine and it checks good, but when they bring the load tester out to my car, and hook it up to the battery it comes up bad. So I guess the machine that it checked good on checks for something different from what the load test machine checks for. Well, they know my alternator is good now. Just gotta deal with the store manager now. 
I spent about 45 min with the store manager explaining my beef, and he explained how and what Yellowtop "DEEP CYCLE" batteries were intended for, and supposedly automotive use (in cars) is not one of the applications. Theres more to the story if you wanna shoot me a PM.
Otherwise that is awesome