[time-nuts] Sulzer 5A & 5P PSU/battery question

Scott McGrath scmcgrath at gmail.com
Thu Nov 1 21:42:55 UTC 2012


Batteries Plus in the US builds nicad packs to order they have built packs for my 105 and 5065a and 5061a packs with original specification cells

Sent from my iPhone

On Nov 1, 2012, at 5:27 PM, Attila Kinali <attila at kinali.ch> wrote:

> On Thu, 01 Nov 2012 21:51:21 +0100
> Magnus Danielson <magnus at rubidium.dyndns.org> wrote:
> 
>> Yesterday I picked up a Sulzer 5A + 5P without batteries. It is supposed 
>> to have 21 D-cell NiCd batteries, but today those are not easy to come 
>> by,
> 
> NiCd Batteries still exist, but have been mostly replaced by LiIon/LiPoly
> packs these days. Though, you should be still able to find NiMH batteries,
> which are in most cases a drop in replacement for NiCd, if you keep
> two things in mind:
> 
> 1) The maximum charge current of the battery should never be exceeded.
> NiCd were much more forgiving in that regard.
> 
> 2) When charging finished, then the batteries need to be disconnected
> unless you do a trickle charge. At least this was a problem with the
> early NiMH, it might have changed in the past 15 years. Check datasheet.
> 
> 3) Charge end detection for fast NiCd chargers (>1C) does not work with
> NiMH as the negative Voltage slope of NiMH is not as pronounced as with
> NiCd. If you have such a charger, you need to replace it with a modern one.
> 
> 
> HTH
> 
>            Attila Kinali
> 
> PS: Yes, i cannot count :-)
> -- 
> There is no secret ingredient
>         -- Po, Kung Fu Panda
> 
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