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- Path: sparky!uunet!mcsun!ub4b!news.cs.kuleuven.ac.be!blekul11!frmop11!dearn!esoc!kchan
- Organisation: European Space Operation Centre (E.S.O.C)
- Date: Friday, 18 Dec 1992 21:18:25 CET
- From: <KCHAN@ESOC.BITNET>
- Message-ID: <92353.211825KCHAN@ESOC.BITNET>
- Newsgroups: comp.sys.handhelds
- Subject: Re: Psion3 battery life
- References: <1992Dec1.061206.13221@netcom.com>
- <1992Dec3.132522.16676@zellweger.ch> <1992Dec3.152645.12159@city.cs>
- <1992Dec8.100001.22440@cs.hw.ac.uk> <1992Dec15.114022.1@pearl.tufts.edu>
- Lines: 17
-
- Also consider that NiCads start off fully charged at 1.3V and then hold steady
- at about 1.2V before dying completely. On the other hand, alkalines and other
- non-rechargeables start off at 1.5V and drop steadily as they are discharged.
-
- I do not know how the low battery detection system works on the S3 but I
- suppose that it would be safe to assume that a Zener diode (or similar) is
- triggered when the battery voltage reaches the diode's threshold voltage.
- Unless it is a high spec component, then the threshold voltage will then tend
- to vary from machine to machine or batch to batch.
-
- So if the threshold voltage is close to 1.2V, then one will tend to get the
- low battery warning significantly earlier than with non-rechargeables.
- -----
- Khee Chan
- PROFS: esoc(kchan) BITNET/EARN: kchan@esoc SPAN: jplsp::kchan
- INTERNET: kchan@jplsp.jpl.nasa.gov COMPUSERVE: 73750,1402
- I speak for no-one, and no-one speaks for me, sometimes not even myself!
-