Olympus-OM
[Top] [All Lists]

Re: [OM] Motor Drive 2 - What to look out for

Subject: Re: [OM] Motor Drive 2 - What to look out for
From: "Julian Davies" <julian_davies@xxxxxxxxxxxxxx>
Date: Mon, 19 May 2003 21:18:16 +0100
If I remember correctly, the quote I was given for 1/3A cells (GP) was
minimum order 1000. That was via www.eurobatteries.com.
The issue with using 1/3A cells is how to assemble a pack which fits, given
that the original is spot welded closely end - to - end. I can't think of a
good way to emulate spot welding with solder.....

Julian
Cambs, UK
----- Original Message ----- 
From: "Hughes" <hi100@xxxxxxxxxxxxx>
To: "Olympus List" <olympus@xxxxxxxxxxxxxxx>
Sent: Monday, May 19, 2003 3:16 PM
Subject: [OM] Motor Drive 2 - What to look out for


>
>        For rebuilding Battery packs people on this thread have said that
nobody makes NiMh 1/3A
> cells, although some have used 1/3AA NiMh cells.     In fact GP Batteries,
a large Chinese Battery
> vendor lists 1/3A NiMh cells in their catalogue. These are 450mAh (min),
500mAh nominal. These
> should be capable of about "3C" in other words 1350mA peak current, which
should be more than
> enough given the nominal spec for the MD2. Although the OM charger should
work with these cells it
> will likely degrade the NiMh cells, particulaly if they are left on for
extended charge periods.
> The cells are specd to last a year or so in overcharge but I am somewhat
sceptical given general
> issues with overcharging NiMh. Also cell charge efficency drops at the
lowish charge rates of the
> Oly charger (probably less than C/10 for these cells), so determining
ideal charge time maybe
> require some testing. Even though GP lists the 1/3A cells in their
catalogue, they may only build
> to (large) order, so they may not really be available retail. I have not
tried to find a retailer,
> although many suppliers list the more common size GP cells, like full size
AA.
>
> I have been trying to get Huanya another Chinese vendor to sell me their
1/3A NiCd cells (300mAh)
> which have a higher rating than the more common GP brand NiCd's (250mAh)or
Sanyo cells, but they
> don't stock cells, so unfortunately you need to order a really large
number before they are
> interested in doing business.
>
> The 1/3A NiMh cells from GP are attractive on paper, but would require
some investigation to find
> best charge times with the Oly charger.
>
> Regards,
> Tim Hughes
>
>
>
>
>
>
> < This message was delivered via the Olympus Mailing List >
> < For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
> < Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
>
>


< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >


<Prev in Thread] Current Thread [Next in Thread>
Sponsored by Tako
Impressum | Datenschutz