| |
VK3ABK > INFO 04.05.03 19:23l 27 Lines 1131 Bytes #999 (0) @ WW
BID : 55222_VK3KAY
Read: DB0FHN GUEST
Subj: Re: Life of various batteries.
Path: DB0FHN<DB0ZWI<DB0CHZ<DB0ERF<DB0FBB<DB0FHK<DB0SIF<DB0MRW<DB0RGB<OK0PPL<
RZ6HXA<SP7MGD<ON0BEL<ON0AR<ZL2BAU<VK6HGR<VK3KAY
Sent: 030426/0707Z @:VK3KAY.#WEV.VIC.AUS.OC #:55222 [Wendouree] $:55222_VK3KAY
From: VK3ABK@VK3KAY.#WEV.VIC.AUS.OC
To : INFO@WW
Hello all
Andy, G0FTD has sent a bulletin about 'Life of various battery types', and
Pete, G6KUI, added some pertinent comments. This was all useful information,
and I have saved it in my 'Floppy' library, as usual.
I would like to add one important alternate observation to these bulletins.
Andy has mentioned "memory effect" in relation to NiCd cells, and this I
believe, is non-existant as far as we Hams are concerned.
This 'Memory Effect' has been appearing in print, and verbal discussion,
whenever 'amateurs', as distinct from 'professionals', are involved.
However, I believe that the low capacity sometimes found in NiCd cells, is
due to incorrect charging, which, due to the nature of the NiCd operating
voltage curve, is difficult to predict. This is made more difficult by using
'constant current' charging, as is often recommended. Over heating of the
cell becomes a danger and causes reduced charging capacity.
I put 'Memory Effect' in the 'folk-lore' category. This myth appears to grow
each time it is mentioned, *because* it's mentioned.
73. Dick. VK3ABK.
Read previous mail | Read next mail
| |
