Any of you run any lithium's? I was thinking about getting a 36v Lithium marine battery to replace my 3 group 31 Optima Blue tops.
What mfg would you recommend? Will 1 of the 36v lithiums last as long as 3 12 volts?

Suggestions appreciated!

Relion, K2 (can actually get you in touch with David @ K2 if need be) are a couple companies that I know of.

Beside the weight reduction, battery life surpasses lead batteries by a ton.

The down side is that they are EXPENSIVE.

Relion are pretty cheap compared to other company's

Over here in Tennessee we have the best in the business. Myself and the rest of the staff at Lithium Pros take pride in our product. I believe 11 of the boats in the classic were running our stuff. We offer only the best trolling and cranking batteries. Our batteries are 100% safe as well as we use a non volatile chemistry in our batteries. The chemistry is Lithium Ion. At less than a 4th of the weight of conventional lead acid battery, those who make the switch have experienced the following: faster hole shots. 2-3 mph gain on top end. Saved space. bass boats setting 2-3 inches higher in the water. We would love to answer any question anybody may have about our product. you can reach us here in Knoxville TN 8:30am-5:30pm Monday through Friday Will@lithiumpros.com (865)688-2083.

Best regards to all,
Will.