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- From: collin@angelo.amd.com (Collin K. Ong)
- Newsgroups: comp.sys.mac.hardware
- Subject: Re: PowerBook battery life & AC
- Message-ID: <collin.714964080@angelo>
- Date: 28 Aug 92 01:08:00 GMT
- References: <1992Aug26.210441.26322@dartvax.dartmouth.edu> <zaphod-270892143114@gregt.winona.msus.edu>
- Sender: usenet@amd.com (NetNews)
- Organization: Advanced Micro Devices, Inc.
- Lines: 25
- Nntp-Posting-Host: angelo
-
- zaphod@vax2.winona.msus.edu (Gregory Talmo) writes:
- >>
- > Bob, what is probably happening is the dreaded 'memory effect' common to
- >NiCad batteries. If the battery is not fully (or at least close to it)
- >discharged before it is recharged then a "memory barrier" is created at the
- >point where the battery started to recharge. Thus the amount of charge
- >that a battery can take is reduced, and the batterie does not last as long.
- > The best thing to do with these type of batteries in order to get the
- >maximum life out of them is to run 'em right down to where the "10 minutes
- >of power..." dialog comes on, then put 'em the recharger and let them
- >charge all of the way.
-
- It has been confirmed by various battery experts that there is no such
- memory effect. I don't want to get into it right now but the conclusion is
- that there is no memory effect, just something that looks like it.
-
- Anyway...
- > Unfortunately once the barrire is there I don't think that there is
- >anything that you can do to get rid of it. Also the projected life span
- >for the Apple batteries is only about a year anyway, so yours could just be
- >getting a little little long in the tooth.
-
- On sci.electronics, there was discussion of a device that would 'zap'
- dead nicads and bring them back to life. I have no experience with this
- however.
-