My question is if there is a ratio to reserve capacity increase?
Pretty much much I am trying to figure out is what my reserve capacity on 2, 170 reserve minutes batteries wired in series?
Or tell me how many hours will I have drawing 12.25 amps per hour with 2, 170 reserve minute batteries wired 24 volts

P=VI (or I=P/V) so if you double the voltage for the same power, you get half the amps drawn. So your batteries should last roughly (there is still battery resistance) twice as long if you were to say run LED lights that could be run either 12 or 24 volts.

Make sure whatever you're going to run can handle 24 volts though!!!

Yeah it's led lights 10-30 volt

It will take ALONG time to drain a battery running LEDs

I was running them on one battery and I would get about 2 1/2 hours before I noticed a difference

Coe thanks but I am mainly looking for a ratio of how long they will last. I understand the concept

DDB-

First of all not all 12v batteries are identical. You need to research the functional specs of the brand of batteries you're using. i.e. Reserve capacity, short circuit capacity, deep cycling capability

Once you have these numbers identified then you can use that as a baseline and use the ratio concept Gunner discusses above.

They are that how I know they are the same

.

The . Was just to mark this thread. I have heard it called everything from berlynn to da haven. Lol did you go to Mosley?

Same batteries with the same load will drain in pretty much the same amount of time whether they are wired in series or in parallel. Only benefit I see to running at 24v is the drivers in the lights may run slightly cooler at higher voltage. May prolong the life of them...

do they draw more amps at higher voltage?

if so i'd keep em at 12volts with two batters and double the reserve capacity

Less current at higher voltage. That's why I said they may run slightly cooler. Reserve capacity is doubled either way.

6 one way, half dozen the other...

*reserve capacity isn't really doubled when batteries are wired in series, but current draw is cut in half so it has the same effect.*

That isn't anything really specific to these lights. Any time you run something on higher voltage it requires less current to do the same job. In general, less current means less heat (least that has been my experience). In this case, my guess is the difference is minimal and the lights are designed to run at 12 or 24 which means they are designed to dissipate the extra heat. Some devices have strict tolerances on voltage, but if you have options, I'd always prefer to run at the highest voltage allowed/available.

I'm not an electrical engineer or anything, but this is the kind of stuff I do for a living. When voltage gets low and current demands are increased, shit gets burned up.