battery question

[Onebadkr]

I went to Walmart and got the biggest deep cycle marine battery was 100 apiece and I can go 6-7 miles on my lifted ezgo of this helps runs just like it did but with half the run time as expected

[JohnnieB]

Originally Posted by Onebadkr

I went to Walmart and got the biggest deep cycle marine battery was 100 apiece and I can go 6-7 miles on my lifted ezgo of this helps runs just like it did but with half the run time as expected

I suspect you just learned a six-hundred dollar lesson.

Better start saving for a set of golf cart batteries, because those boat batteries won't last long.

[Wylie_Tunes]

The more batteries you have in a bank, the shallower each individual battery is depleted between charges. So if the end voltage is the same and the combined Ah is the same, the bank with the most batteries would be the better option.

[yurtle]

All deep cycle batteries aren't made the same. Golf cart batteries and marine batteries are two totally different beasts. Golf cart batteries can be hit with a 300, 400, 500, or more amp demand. And that demand can be extended in duration. Many of us drive for extended periods, with numerous heavy passengers, for many miles/run hours.

Edit: What you said is true in theory. In practicality, most folks run six, and a few run seven or eight batteries.

Originally Posted by Wylie_Tunes

The more batteries you have in a bank, the shallower each individual battery is depleted between charges. So if the end voltage is the same and the combined Ah is the same, the bank with the most batteries would be the better option.

so ideally 36 1v batteries is best ?

[Wylie_Tunes]

Originally Posted by crash test dummy

so ideally 36 1v batteries is best ?

yes, but it would look like a bowl pasta once wired up

[Volt_Ampere]

It's not the number of batteries but their Amp Hour Rating that tells capacity. A 12V golf cart battery with the same amp hour rating as a pair of 6V will have the same capacity and work just as well. Problem is that most 12V batteries have a lower Amp Hour rating than a 6V.

[JohnnieB]

With electrochemical cells, size makes a difference.

The lead-acid cells typically found in Deep-cycle, Marine and SLI batteries, all have about 2VPC (Volts per Cell).
The storage capacity of those cells is determined by the exposed area of the plates and the concentration of the acid the plates are exposed to.

There are other factors that influence storage density, but as long as you stick the the same construction and chemistry, the cell with the greatest physical dimensions, has the greatest storage capacity.

A 6V battery is a box that contains 3 x 2V cells and an 8V battery is a box that contains 4X 2V cells and a 12V battery is a box that contains 6 X 2V cells. If the boxes for all three batteries are the same size, the cells in the box have to be smaller for higher voltage batteries.

[yurtle]

I thought I read:

I went to Walmart and got the biggest deep cycle marine battery was 100 apiece and I can go 6-7 miles on my lifted ezgo of this helps runs just like it did but with half the run time as expected

While difficult to decipher, the "marine battery" part made me think he bought the wrong battery(s).

[Sir Nuke]

Originally Posted by yurtle

I thought I read:

I went to Walmart and got the biggest deep cycle marine battery was 100 apiece and I can go 6-7 miles on my lifted ezgo of this helps runs just like it did but with half the run time as expected

While difficult to decipher, the "marine battery" part made me think he bought the wrong battery(s).

BINGO!!

Problem solved