xTenn wrote:
> <jameshanley39******.co.uk> wrote in message
> news:1167105962.932086.184310@h40g2000cwb.googlegr oups.com...
> >
> >
> > thanks, that's really useful..
> > Though since it's 14.8V, would I be better off "under doing" it
> >
>
>
> 14.8v? My Ac adaptor for the TC1100 (part # 239427-001) is rated 18.5v...
> Listed nominal operating voltages may not be taking into account charging
> circuit design and/or tolerance?
>

thanks for pointing that out.. I saw an adaptor on ebay rated at 18.5V
as you say.

It's 18.5V 3.5A

incase anybodyis interested, it says it's compatible with the HP Tablet
TC1000 too, and some Compaq Presario models are listed.

>
> >
> > (P=IV, power = current & voltage. Cleraly current is <= 5V and the
> > adaptor at batterygeek site handles up to 5V and no more.
>
> I am not sure about the 5v limitation you refer to, since the adaptor
> outputs we discussed here were in the 14 - 19v range. Maybe I misread?
>

OH.... I mistyped
I wrote
"Clearly current is <= 5V " I meant <= 5A

maybe you read it as "Clearly voltage is.." ;-)

I used those wrong figures of 38/14.8 to get less than 5A. But
38/18.5 gives even less. Makes sense anyhow, adaptor is 3.5A



> Either way, one thing is certain - you have a lot of options to get your 8hr
> run time. Just be sure to fudge a bit on the watt calculation. I typically
> use rms values out of habit (.717), but anything is fine as long as you
> don't use the battery company's wattage figures without a remaining reserve
> capacity. But anyone who can quote ohm's law knows that. ;)

I don't know much about electricity..
So, how many volts would I use? 18.5V?
I read something along the lines of the RMS value being an average..
Should I use the RMS voltage? What is that value?

I'd have thought that the standard adaptor just uses 18.5V. So that's
what i suppose i'd use