From: Johannes Wolf (mp2100_at_mail-gw.estec.esa.nl)
Date: Mon Sep 16 2002 - 02:15:29 PDT
The original battery pack has 4 AA size NiMH cells giving around 5.5 Volts
if fully charged. The Newt works well down to 4.8 Volts provided from the
batteries.
Feeding the Newt via the power adaptor plug would open the possibility to
use up to absolute MAXIMUM 7.5 Volts. So you could use 2 Li-ion cells
providing around 7.5 Volts in series if you connect them to the adaptor
plug.
You can also use a stabilized dc adaptor for 7.5 volts. As long as you do
not charge batteries inside the Newt, the current limitation at 1.2 Amps is
not used and needed (Newt will draw ca. 120 mAmps maximum with backlight)
And there is another choice you did not mention:
try to get battery trays for the Newt.
You can use either alkalines or NiMHs (but without the possibility to charge
them in the Newt as long as you do not modify the tray)
Johannes
> [mailto:newtontalk-bounce_at_newtontalk.net]On Behalf Of Travis
> Sent: Saturday, September 14, 2002 4:57 AM
> To: NEWTONTALK
> Subject: [NTLK] New to List; Battery Questions
> Hi,
> I just got two 2100s for my kids, but all the small bits
> were removed.
> I've dug out an old 120 to use as a hub in a sneaker net untill we get
> some NICs. The power problem I could use some help with. Best would be
> to find some cheap dead Newton battery packs to refurb. 2nd choice would
> be to build an external pack out of "C" or "D" NmH, or Lithium ion
> squares to plug into the AC adapter port, Google didn't return any DIY
> pages for this. Did I miss one? Or as the last choice, buy a good pack
> or cage :(
> 6 "C" cells would give 7.2 Volts, almost what the 2000 AC
> adapter is
> rated at, is there any gotchas to worry about? Anybody know the Radio
> Shack part # for the connector to plug into the adaptor port?
> TIA,
> Travis
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