Long time lurker here. I've had some experience with inverters and
batteries. An inverter will draw amps equivalent to about 10% of it's
wattage rating just connected to the battery, whether you are using it
or not. Back to lurking.
Larry
Simon Worby wrote:
> You're thinking along the right lines, to my mind, but an inverter to mains
> voltage and back to whatever the laptop wants (typically 15-18v DC) is
> wasteful. You can buy a power pack for laptops that will take power direct
> from 12v DC battery and convert it to the correct output for your laptop.
> They're around £50 in the UK (70 US$).
>
> In your calculations, don't forget than even a leisure battery will only
> really perform to about 50% of its stated capacity, and that the laptop can
> have a significant draw. Nevertheless, you should be able to get 8 hours or
> more use out of a decent 100Ah lead acid battery.
>
> Regards,
>
> Simon
>
> -----Original Message-----
> From: Ken Norton [mailto:ken@xxxxxxxxxxx]
> Sent: 16 July 2009 02:36
> To: Olympus Camera Discussion
> Subject: [OM] speaking of batteries
>
> On the "vacation", my wife is planning on completing the editing of her book
> and really needs to have her laptop powered. However, we are going to be in
> the "sticks" without electricity for a few days at a time. Anybody have any
> recommendations--uh, make that AFFORDABLE recommendations?
>
> My budget for this would be the cost of a night or two of a hotel room. I
> was thinking of a 12v deep-cycle battery, inverter and a charger.
>
> Rumor has it that the rewards for pulling this off are rather high. :)
>
> AG
>
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