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Author Topic: Portable Battery for location Kit  (Read 18251 times)
Studio12NYC
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« Reply #40 on: June 13, 2008, 07:21:53 PM »
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Man i just wanted a solution to power a laptop, pocket drives digiback for a few hours.

I guess it will be a small honda with a couple of hundred feet of extension cords.

So
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Steve Kerman
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« Reply #41 on: June 13, 2008, 07:40:58 PM »
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Studio, there are many suitable inverters available out there.  Here is one place: http://earthsolar.com/inverters.htm  (I can't vouch for them--I've never done business with them.  I link to them as an example of what is available.  I do know, however, that the brands they list are the "usual suspects" for bulletproof inverters of this sort.)

Pick something that runs off a 12V battery, is pure sine wave, and provides sufficient power for your equipment.

Alternatively, there are "automobile adapters" available for virtually all laptops that will power your laptop directly from any handy 12V battery.

B&H has substantial 12V batteries that can power quite a lot., that are intended for powering lights for TV news reporters and the like.  IIRC, one brand is "Bescor."  I have one of those batteries and an "automobile adapter" for my laptop, which is easily sufficient to run my laptop all day long.

There's a company out there called "iGo" that makes little power converters that are designed to essentially power everything from anything--one converter to power your laptop, cell phone, PDA, etc., from 120VAC, 12VDC cigarette-lighter connector, or from an airline connector, etc.  (Or at least they did a ~3-4 years ago when last I looked at them.)
« Last Edit: June 13, 2008, 11:40:14 PM by Steve Kerman » Logged
Rick_Allen
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« Reply #42 on: June 13, 2008, 08:32:54 PM »
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Quote
If you are drawing a constant 60W, for example, then the battery drain will be approximately 5A. If you want this to last for 8 hours then you need an 40Ah capacity battery.

From my tests using a 10Ah battery connected to a 150w 12v to 240v inverter I get about 70 minutes run time. So 40Ah battery is only going to give me 4-5 hours. This is based on using the 85 watt MBP charger so I guess a 60watt macbook charger might give me another hour but want recharge the battery in the process.
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JTFOTO
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« Reply #43 on: June 17, 2008, 09:37:45 AM »
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Great thread!!!  I was looking for just the same thing.
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Studio12NYC
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« Reply #44 on: June 22, 2008, 10:39:53 AM »
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Thanks for all the responses!

A lot to think about
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