0caarntedd 7 years ago ReplyUpvoteI think I've seen those batteries rated at anywhere from 18 to 25 Ah. Divide that (say 20) by .320 gives 62.5 hours. Double it for 2 batteries, 125 hours. Someone with a large electrical brain please correct this if I am wrong.

0iPodGuycaarntedd Answer 7 years ago ReplyUpvoteNo, you double either the amps or the voltage, not both.Using your figures, if the OP connects the batteries in a series, he will have 62.5 hours @ 12 volts.Parallel would give you 125 hours @ 6 volts.

0caarnteddiPodGuy Answer 7 years ago ReplyUpvoteYeah, 125 hours @ 6V, I just didn't read the Q properly. I drink a bit.....

07654321caarntedd Answer 7 years ago ReplyUpvoteIf you connect batteries in series (which I'm assuming he is since it is a 12V fan) the capacities dont add up.

0tchiarito 7 years ago ReplyUpvoteFYI, so far the fan ran 10.5 hours last night, and is running strong tonight after 2 hours.

0tchiarito 7 years ago ReplyUpvoteThanks again, and sorry, I realized what the 320 was after I shut down, and after going to bed.

0tchiarito 7 years ago ReplyUpvoteThanks so much to all. Where does the 320 (or .320) figure come from?

0tchiarito 7 years ago ReplyUpvotethanks, they are fully charged (new) 6v alkaline lantern-type batteries. They also say NEDA 908A 6 volts, if that helps. Thanks again.

## Discussions

7 years ago

I think I've seen those batteries rated at anywhere from 18 to 25 Ah. Divide that (say 20) by .320 gives 62.5 hours. Double it for 2 batteries, 125 hours. Someone with a large electrical brain please correct this if I am wrong.

Answer 7 years ago

No, you double either the amps or the voltage, not both.

Using your figures, if the OP connects the batteries in a series, he will have 62.5 hours @ 12 volts.

Parallel would give you 125 hours @ 6 volts.

Answer 7 years ago

Yeah, 125 hours @ 6V, I just didn't read the Q properly. I drink a bit.....

Answer 7 years ago

If you connect batteries in series (which I'm assuming he is since it is a 12V fan) the capacities dont add up.

7 years ago

FYI, so far the fan ran 10.5 hours last night, and is running strong tonight after 2 hours.

7 years ago

Thanks again, and sorry, I realized what the 320 was after I shut down, and after going to bed.

7 years ago

Thanks so much to all. Where does the 320 (or .320) figure come from?

7 years ago

thanks, they are fully charged (new) 6v alkaline lantern-type batteries. They also say NEDA 908A 6 volts, if that helps. Thanks again.