6v vs 12v battery question

[Cdash]

I have two battery questions that I can't find answers to. I'm hoping that the questions are not too stupid.

1. Amp-hour ratings - when I look at battery specs, I see different amp-hour ratings for different periods of time for the same battery, but when people talk about batteries, they only mention amp-hours. What time period from the battery spec charts is commonky used?

2. For 6v batteries, I understand that I'd need two hooked in series to make it 12v. If I'm am looking at a single 6V battery that is 100 amp-hours (made up number) when I hook up two of them in series to make a 12V system, do I have 100 amp-hours at 12v, or would I have 200 amp-hours? Wasn't sure if amperage gets cut in half because voltage doubles....

Thanks for the help!

[korbe]

2oldman wrote:
"(made up number)"

Yes, but he could have at least made up a credible one. My goodness....

[2oldman]

"(made up number)"

[Bobbo]

Almot wrote:
I don't see much reason for getting 2*6V @100 AH each. Unless you have a really small trailer or van, or lifting 62-63 lbs is difficult to you. Most 2*6V setups are 220-230 AH per battery. 63 lbs is a lot of weight to lift, I have to say.

It was a made up number to ask his question.

[RJsfishin]

He din't say he was getting 6'ers at 100 amps, I doubt there is such a thing.

[Almot]

I don't see much reason for getting 2*6V @100 AH each. Unless you have a really small trailer or van, or lifting 62-63 lbs is difficult to you. Most 2*6V setups are 220-230 AH per battery. 63 lbs is a lot of weight to lift, I have to say.

[Cdash]

Dennis M M wrote:
Lots of good info here The 12 Volt Side of Life

I agree, good information! Believe it or not, I did read that first thinking that it would be in there, but it isn't. Figured that I needed the "12 volt side of life for dummies" version.

Thanks for the help!

[2oldman]

Series= add voltage, same amps. Parallel = add amps, same voltage.

[Dennis_M_M]

Lots of good info here The 12 Volt Side of Life

[Ed_Gee]

The standard most used for RV is the amp hour rating over 20 hours.... the time it takes to draw the fully charged battery down to 10.5V (empty) at a constant current of 5 amps.

Yes, two 6 Volt 100AH batteries in series will give you 12 Volts at 100 AH.