Optima Batteries 8051-160 D31A YellowTop Dual Purpose Battery

i've been using the d31 blue top for a long time now and noticed the price on the yellow top dropped. Optima says the blue is for deep cycle trolling motor use while yellow is for deep cycle and starting use however I have it on good authority from optima that the d31m marine battery is the same inside both the blue and yellow tops, so if the yellow is cheaper today, I'll buy it instead!

I bought this as storage for my solar panels. I have 85 watts total and this battery holds the charge well.

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i'm using this battery for my solar generator.it holds the charge with ease and works for 12 hours until the next solar charge.the price is good compared to other batteries of this type.

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My battery arrived in a reasonable amount of time, well packaged, and in good condition. It has worked well for me. I'd recommend it to anyone.

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I replaced my standard truck battery. Didn't quite realize how big it was but with some minor adjustments I'm glad that I made this purchase and I will no doubt never have power problems with my truck again.

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