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- Newsgroups: comp.sys.laptops
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!darwin.sura.net!nntp.msstate.edu!willis1.cis.uab.edu!hyatt
- From: hyatt@cis.uab.edu (Robert Hyatt)
- Subject: Re: How is the battery life with screen illumination turned off?
- Message-ID: <1992Nov23.024550.5552@cis.uab.edu>
- Organization: University of Alabama at Birmingham
- References: <1992Nov22.051627.24543@leland.Stanford.EDU>
- Date: Mon, 23 Nov 1992 02:45:50 GMT
- Lines: 26
-
- In article <1992Nov22.051627.24543@leland.Stanford.EDU> avery@ccrma.stanford.edu (Avery Wang) writes:
- >Hi-
- >
- >I've been shopping around and am slightly discouraged at the low battery life
- >ratings I've been seeing. Typically it's about 2-4 hours under "normal"
- >usage. Acceptable would be about 8-10 hours (I want to be able to go to the
- >moon and back with a single charge!). I've asked around a little, but nobody
- >seems to know how long the battery life is if the you turn off the screen and
- >just do word processing with lots of pauses for thought. Good power
- >management should be smart enough to slow down the clock when I'm not typing
- >or doing anything.
- >
- >So does anyone have any idea what the proportion of the system power goes to
- >the screen lighting?
-
- I used to use a Compaq LTE 386/s20 and they claimed about 30% or so for
- the screen in the Compaq documentation. The cpu/memory is the biggest
- drain. no backlighting might get you another hour if you are lucky. An
- alternative is to buy a good gel 12v battery, charge it up, and use it
- to drive a 12v to your machine converter. Keep the battery in a separate
- bag you can keep under your feet and you can work from LA to London.
-
-
- --
- !Robert Hyatt Computer and Information Sciences !
- !hyatt@cis.uab.edu University of Alabama at Birmingham !
-