From: Adam Wilkinson (AWILKIN1_at_ren0010.so.ford.com)
Date: Tue Mar 07 1995 - 19:04:13 EST
> Date: Tue, 7 Mar 1995 17:18:26 -0500 (EST)
> From: "John H. Kim" <jokim_at_mit.edu>
> Reply-to: jokim_at_mit.edu
> To: TP750_at_CS.UTK.EDU
> Subject: Re: Are Lithium Ion batteries avail...
> In message Mon, 6 Mar 1995 23:11:26 -0500 (EST),
> Joshua Hosseinoff <hosseino_at_yu1.yu.edu> writes:
>
> > What about the lead acid batteries that IBM first used in the original
> > Thinkpad 500 models? I remember that in PC Magazine's battery rundown
> > test which gets about 1 hour 45 mins on the 755CE, the lead acid battery
> > in the 500 lasted for 9 full hours and thats in a test to rundown the
> > battery as quickly as possible. Unfortunately as we all know IBM
>
> I think that's more a function of lower power draw by the 500. The TP750
> mono got 5 hours 30 min in the same test (I was averaging 5h 10m before I
> bought a memory upgrade). Same battery as the 755CE. At work I run into a
Not true, the 750 and 755CE have different batteries!
> lot of battery energy density charts for autonomous subs and per unit
> weight lead-acid is near the bottom. Progressively better are NiCd,
> Alkaline, NiMH, and Li in that order.
-- Adam Lee Wilkinson Portable Computing Technology Specialist Ford Motor Co. - Marketing & Sales Systems
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