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What's a good deal on a battery-based portable outlet (to power a monitor or laptop)?

Some friends and I are doing video shoots outdoors. His camera has a very small LCD screen, and sometimes it's difficult to manually focus, even with the Focus Assist enlargement, because the screen is so tiny. I was thinking if I could pump the live signal from the camera into a computer or monitor using some converters to Component video and then put that to VGA or a laptop input somehow, we would be able to see the picture much larger and be able to focus better.

I'm thinking if I buy a portable power unit - something that I can plug a monitor or laptop into - it will give me enough time for hours in the field, rather than just relying on a 2-3 hour laptop battery. Sometimes the shoot can last most of the day.

I saw this one for $85:
http://www.amazon.com/Schumacher-PP-2200-Portable-Outdoor-Power/dp/B002CG001E

...but then I realized that I know NOTHING about these things. Will it power a monitor or laptop? And for how long? I'm so confused! And how can I save money on it?

by sirlouie
asked a year ago

4 Answers answer

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You will need to know the power consumption on your device in all modes before you can tell how long your back up power supply will last.

Battery capacity / device consumption = time

Don'f forget to convert your units.

theoneill555
a year ago

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Can you guide me through figuring that out? let's assume, for example, that I have an HP 1702 monitor. Where do I find the units of capacity and consumption? Same for my laptop. I'm confused! Sorry.

sirlouie
a year ago

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@sirlouie: It is listed in your manual under specs. Or you can go to the manufacturer's website and look it up there. Here is the spec sheet for an HP 1702 monitor -

http://h18004.www1.hp.com/products/quickspecs/11496_div/11496_div.html

Nominal Current 1.5 A maximum
Typical Power Consumption: 8.5 watts
Maximum < 40 watts
Power Saving < 2 watts

theoneill555
a year ago

vote-for1vote-against

Okay, thank you very much. Now how do I make sense of those numbers (1.5A max, 8.5 watts / max 40 watts for the monitor, along with the battery's numbers of 22 Amp Hours (do I divide that by the 1.5A? Is that per hour?) and 400 watts? Does it seem then that I could run it for at least 10 hours? Because 400 watts / 40 watts = 10, and 22 / 1.5 = 14 ... which is right?

I appreciate your help so far. Feel free to stop if I get too annoying.

sirlouie
a year ago

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