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[OM] Re: OM-4T, OM-2SP Battery Consumption Problem

Subject: [OM] Re: OM-4T, OM-2SP Battery Consumption Problem
From: "John Hermanson" <omtech@xxxxxxxxx>
Date: Tue, 4 Jan 2005 09:13:29 -0500
There were no mercury batteries which were supposed to be used in place of 
silver oxide in these models.

John Hermanson
Camtech Photo Services, Inc.
21 South Lane, Huntington, NY, 11743-4714,
631-424-2121, www.zuiko.com
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----- Original Message ----- 
From: "Thomas Tonelli" <thomas.tonelli@xxxxxxxxxxx>
To: <olympus@xxxxxxxxxx>
Sent: Tuesday, January 04, 2005 1:15 AM
Subject: [OM] Re: OM-4T, OM-2SP Battery Consumption Problem


>
> OK, thanks,
>
> I would have never thought of going to these lengths. I will go through 
> the
> procedures you suggest. The batteries were 357 Silver Oxide manufactured
> however for Walmart, which I purchased in their watch department. The coil
> at the end of the battery chamber looks good and the chrome cap is clean.
>
> Do you know if the mercury batteries had different characteristics under
> load compared to the silver oxide?
>
> -----Original Message-----
> From: olympus-owner@xxxxxxxxxx [mailto:olympus-owner@xxxxxxxxxx] On Behalf
> Of Moose
> Sent: Tuesday, January 04, 2005 12:50 AM
> To: olympus@xxxxxxxxxx
> Subject: [OM] Re: OM-4T, OM-2SP Battery Consumption Problem
>
> Thomas Tonelli wrote:
>
>>Thanks for the suggestion.
>>
>>The batteries were fine according to the battery check.
>>
> The battery check is mostly useless for anything but checking which
> camera has batteries in it. The battery check doesn't check it under
> load and so will beep with pretty much anything in there. The problem is
> that (as with all manufacturers' cameras of that era), the batteries are
> put under a large load while the shutter is open. In OM cameras, if the
> necessary voltage/current to assure an accurate exposure isn't present
> when the loads starts, the camera simply refuses to take the picture and
> stays locked up until reset. This is the REAL battery check.
>
> Are these really 357 batteries, or some other model which says it
> replaces the 357? Battery packages often LIE, and claim that other
> batteries with the same nominal voltage and physical size are
> replacements for the 357. The 76 and 303 are batteries that will give
> the symptoms you describe after they have been used a bit.
>
> Are you sure the batteries are actually good? Many of us have
> encountered a case of a bad battery in a new, fresh batch. Not common,
> but it can lead to endless frustration if not checked out.
>
> Is the battery circuit clean and tight? The inside contact of the
> battery compartment is soldered to a wire and the joint can become loose
> or corroded, although it isn't common. The other end of the battery
> circuit is more problematic. Since you have a 4T, it likely has a chrome
> battery cap, bu it is still worth making sure the threads on cap and
> bottom plate are clean. Plain 4s had black painted caps and paint in the
> threads was a regular problem. Nect, the current has to go from the
> bottom plate to the frame. Loose bottom plate screws, dirt, oil, etc on
> screws and/or bottom plate can add resistance to the circuit. Make sure
> the screw threads and the places where the botom plate contacts the
> frame are clean and tight. Remember, you are dealing with a very low
> voltage. Resistance that has little effect on the very low current
> needed to operate the metering and battery check may drop the voltage
> under shutter load below what is needed.
>



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