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Hi,  I am looking for advice on which battery or power pack to buy to run a laptop continuously for about 8 hours a day, for a week without electric hookup?  I saw the EFOY at the NEC but it is very expensive.  Is it worth the money or is there something comparable out there?  Thanks

Post last edited on 09/01/2009 01:53:52

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     Kath     

Seeing things that I may never see again,
I can't wait to get on the road again. WILLIE NELSON

I've read of several people using a decent solar cell to recharge the leisure battery.  It depends on the drain the power supply places on it.  How many amps is it?  Something like this may do it.

Steve.

My small laptop consumes a maximum of 60W (the larger ones inevitably use more). A lot depends on what you are doing - CD drives and networks (especially wireless or bluetooth) consume a lot of power. Making some assumptions here...

Assume the laptop uses 50% of the peak power, i.e. 30w
8 hours a day, for 5 days = 40 hours
Requirement is therefore 1200wh
At 12v this equates to 100Ah.

Working on the basis that you can NEVER achieve much better than 50% of the rated battery capacity (and 40% is nearer the mark) you would need at least 2 110Ah batteries, unless you can get some serious recharging capacity!

Glen

Quote: Originally posted by VanGo1 on 08/1/2009

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Hi,  I am looking for advice on which battery or power back to buy to run a laptop continuously for about 8 hours a day, for a week without electric hookup?.......

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Hi,  Thanks for your comments.  Has anyone of you used the EFOY?  If it's as good as the literature says it is, the price is the only stumbling block for buyers.

Kath     

Seeing things that I may never see again,
I can't wait to get on the road again. WILLIE NELSON