<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?


>
> (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?

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. ;)