Re: Are Lithium Ion batteries avail...

["Adam Wilkinson" <AWILKIN1@ren0010.so.ford.com>]

> Date:          Tue, 7 Mar 1995 17:18:26 -0500 (EST)
> From:          "John H. Kim" <jokim@mit.edu>
> Reply-to:      jokim@mit.edu
> To:            TP750@CS.UTK.EDU
> Subject:       Re: Are Lithium Ion batteries avail...

> In message Mon, 6 Mar 1995 23:11:26 -0500 (EST),
>   Joshua Hosseinoff <hosseino@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

awilkin1@ren0010.so.ford.com