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Re: 701s and NiMH batteries
On Tue, 27 Aug 1996 Mitchell_Yee@jud.ca.gov wrote:
> My company finally bought me two NiMH batteries for my 701C
> after hearing my curse my old NiCad battery one too many times.
>
> Is there any care and feeding instructions for NiMH batteries that
> might differ from the NiCads? IBM techies have mentioned
> that the batteries are not supposed to require any specialized
> handling, including deep discharge or trickle re-charge. I'd
The 701's NiMH batteries really seem to work. I've got two. One
is left in the machine all the time, frequently discharged 10%-20%
before recharging. It's held up just fine since January. The other
sits on a shelf, used maybe once a month for trips. It sits at 100%
charge (IBM's recommendation), and it's always been 99% or 100% when
I plug it in, even after a month of non-use. A very pleasant change
from my 750 whose batteries died within a month of frequent partial
charging, and lost 2-3% of its charge every day in storage.
I was told IBM recommends *against* discharging the 701's NiMHs
completely. If you do this, the estimated time remaining at 100%
drops by about 4 minutes. I don't know if this is real, although
I suspect it is since the battery isn't suppposed to have any
writeable electronics inside it.
--
John H. Kim "I stop for red traffic lights" -- bumper sticker
jokim@mit.edu commissioned by the City of Boston as part of a
MIT Sea Grant campaign to shed its reputation for bad drivers.