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# Could a 1500-2000 mA draw from a car battery (in a car) for 14 hours be a problem? Answered

I want to be able to play my portable PS2 on the ride to Colorado in February. It's a fourteen hour drive. I would probably play much of the way up. It will draw 1.5-2 amps. Will this be a problem? Will it cause problems for the battery? Can it handle that for 10 or so hours, with stops in between? Oh yeah, duh! It will draw the full twelve volts. I think the PS2 uses 8.5, but 12v comes out, so... Help?

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So you need to look up the energy capacity of a car battery. Type "car battery energy capacity" into Google. Read the Wikipedia article which comes up as the first hit, in particular the caption to the first figure. That tells you the total energy capacity of a "typical" battery in ampere-hours. You should look at the labelling for your own car battery to know what it's capacity is. Since you know the current draw, simple arithmetic will tell you how many hours that current can be sustained before the battery is drained. That result, of course, would be for using the battery without running the car. While the car is running, the battery is being continuously recharged, so your little device won't be draining it at all.

Yes, you could do that, BUT car batteries aren't often measured in Ah... I forget what they are measured in though... But you think it would be fine, huh? OK. Best Answer

Yes. According to the Wiki article, that's true in North America, but in Europe they're required to be labelled with Ah capacity.

Yup, I saw that, and then I thought, oh wait, is kelseymh in Europe? But I was too tired to do anything about it. :) I'm still trying to decide whether I should run it from the car battery, which is designed to give large amounts of current at short amounts of time, or a golf cart battery, which is deep cycle and will run my portable for about 9.17 hours... :{

Do we assume your car doesn't have a lighter socket then ? If it does, whatyou put on the battery whilst the engine is running, within some limits is fine. You wouldn't want to run a typical 200 AH car battery with a 25 Watt load for more than 80 hours or so though, without charging it.

No, no, that's the point. From a cigarette lighter.