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G4XNH > TECH 19.02.04 20:57l 32 Lines 1195 Bytes #999 (0) @ WW
BID : F11254G4XNH
Read: DB0FHN GUEST OE7FMI
Subj: Re: Recovering Old NICAD/NIMH Cells
Path: DB0FHN<DB0FOR<DB0SIF<DB0EA<DB0RES<ON0AR<7M3TJZ<ON0BEL<ZL2TZE<ED1ZAC<
GB7YKS
Sent: 040219/1903Z @:GB7YKS.#19.GBR.EU #:56191 [Barnsley] $:F11254G4XNH
From: G4XNH@GB7YKS.#19.GBR.EU
To : TECH@WW
John G8MNY wrote:-
An interesting bulletin. However.
>
> The cure for 'memory effect' is to deep-discharge the cell, by connecting
> (e.g.) a 10 ohm resistor across it and leave it until absolutely dead.
> Normal recharging will then give full capacity & no 'memory'.
I must "take issue" with this ;). When I first started with NiCads, I did
many tests and decided to try this "discharge" theory out. Starting from a
high ohmic value, I slowly dropped down to the lowest of the low of
resister value in my junk box, something less than 10 Ohms. Using a
trusted AVO 8 Mk II (High impedance, hence more accurate reading) in
series obviously, as well as a digital meter (I prefer my AVO every time!)
NO current flow was apparent. Not a jot. I then literally shortened them
out individually with a paper clip and still no discernible currnt flow.
Begs the question, What gives these results as current flow IS the case
(They worked fine) although is not apparent. Have I missed something
obvious here?
73 - Jeff, G4XNH @ GB7YKS
Brightraven94@Hotmail.com
Interests. Historical research, dowsing and reading.
Message timed: 19:01 on 2004-Feb-19
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