conserving battery life

[Ian Sidle]

> a) watching mpegs directly from a data DVD.
Actually... an DVD is already literally an data disc. All DVD (movies) 
are, is an UDF formatted disk, with an series  of mpeg2 files, created 
within an specification. The computer mounts the DVD (just like an data 
disc) and using the appropriate software, plays those files.

> b) copying the mpegs from the DVD to my hard drive to play
> (will have to delete afterwards due to limited space).
Indeed. This would significantly decrease battery drain. Make sure to 
do the copy when plugged in, otherwise your battery savings would be 
marginal.

With the RAM disk proposals, it certainly would be possible do that 
with an dvd-rip to an compressed format before hand. A.K.A Using 
divx/mpeg-4 and the like. Although, this would require significant work 
(CPU Time) before hand to do this. Also the quality will not be as good 
(but,  if well crafted/selected settings, then it is 
indistinguishable). In reality, I wouldn't do it.

Of interest is also, an number of airlines are providing on flight 
power. There is the sockets in business class and coach, if you look 
carefully enough on newer planes. You'll probably need your own power 
adapter (to DC  power). Recently, attendants have also been handing out 
large tray-sized batteries,  which would have enough power for you 
laptop through the entire flight. Some airlines do it for free and some 
do not (with an "small" fee). Ask around, nobody advertises it (for 
some reason). There is also companies where you can buy these batteries 
(for ~$200-$300) and keep it for yourself. Excellent idea for an 
frequent traveler.

thanks,
Ian