Article View: sci.electronics
Article #16010Re: NiCd Memory (True or False, opinions?)
From: Tony Arnerich
Date: Wed, 26 Jun 1991 00:23
Date: Wed, 26 Jun 1991 00:23
31 lines
2140 bytes
2140 bytes
Fact #1: ALL NiCad manufacturers claim that "The memory effect has
been eliminated/solved/relegated to the past."
Fact #2: ALL manufacturers will say the above, even when it is not true.
Make that "especially when it is not true", and the other
manufacturer's have beaten you to the claim of having solved
the problem.
Fact #3: My rechargeable shaver used to be able to give 3 weeks of
shaves per charge, now after 2 years it can only do 2 weeks
per charge. It has a 1-hour quick-charge, after which it switches
to trickle (I think - at least the "charge" light changes from
steadily on to flashing at end of quick cycle. At least some
part of the charge circuit knows when a "full" charge has been
reached). I discharge to a fairly consistent level (when the
motor speed suddenly poops out), and usually let it go beyond
the quick charge cycle, and through the night (boy, I *hope*
the charger drops to trickle rate!) In no case do I ever drain
the batteries to absolute zero, nor do I do partial charges. It's
probably gone through only about 50 charge/discharge cycles.
Hearsay #1: A friend at work claims to really drain down his Makita
power tool batteries after each drain below useful voltage. He
swears this is the secret of treating NiCads well.
Hearsay #2: The number of woodscrews he says he can drive is much higher
than the number I have been able to drive (I know, different screws,
different wood,...). It still makes me think I'm a NiCads' worst
nightmare.
tonya@sid.hp.com
Technical Details
Message-ID:
<1990030@hpldsla.sid.hp.com>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!sdd.hp.com!hplabs!hpcc05!hpldsla!tonyaReferences:
<clemon.4914@lemsys.UUCP>Show Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!sdd.hp.com!hplabs!hpcc05!hpldsla!tonya From: tonya@hpldsla.sid.hp.com (Tony Arnerich) Newsgroups: sci.electronics Subject: Re: NiCd Memory (True or False, opinions?) Message-ID: <1990030@hpldsla.sid.hp.com> Date: 26 Jun 91 00:23:37 GMT References: <clemon.4914@lemsys.UUCP> Organization: HP Scientific Instruments Division - Palo Alto, CA Lines: 31