Re: 3/27 InfoWorld - IBM will add upgrade Thinkpad Next Month

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From: Randal Whittle (whittle_at_chaph.usc.edu)
Date: Tue Apr 04 1995 - 14:22:24 EDT


> >> I'm wondering if the lithium-ion battery will work on older 750 series m
> >> If it will run a Pentium for a reasonable amount of time, it should run my
> >> 750 for days:).
> >
> > Not likely. If my father wasn't lying to me (he worked for a
> >battery-development company for a while--one of the majors that mfgrs. for
> >the biggies like Motorola Radios & Cellular Phones), then the charge-cycle
> >characteristics (and perhaps the discharge characteristics as well)
> >involved in charging a Lithium-Ion battery are different enough from
> >NiMH batteries that you wouldn't be able to use the other battery
> >technology in your machine which is designed for NiMH batteries.
>
> That seems reasonable. There is some intelligence in the thinkpad battery,
> which is why it has an off switch. I wonder if the difference in charge
> strategy is incorporated in on-board battery firmware. If so, it might
> work.

        I wondered about that myself, but I'm pretty sure that the
on-board "Battery intelligence" (which incidently, is not standard on
the 360 series) is not capable of changing the charging or discharging
capabilities of the computer. All it does is measure the current
output against time, and provide fairly accurate estimates to the
computer software ("Fuel") regarding how much time/juice is left. Changing
the charge characteristics would be a whole lot bigger job.

----- ___________________________
Randy Whittle whittle_at_usc.edu | Practice random acts |
USC School of Business (Fight on, 'SC Trojans!) | of senseless |
  (My opinions are mine, but since I'm | viol...err.. |
    right, they should be yours too.) | kindness! |
                                                ---------------------------


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