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[Tom_o]

Is there a battery that can be substituted for the Konica Autoreflex T3's original mercury batteries, which can no longer be used?

[Charlie]

What is the original batteery called for in the users manual?

[Mndean]

If it uses. as I see on a website, the mercury PX675 button cell, you do have a substitute that will work. There is an identical size zinc-air hearing aid battery that will fit in the battery chamber and will give you close to correct readings. The vo

[Mndean]

Sorry I was unclear - I meant to say, once you pull the tab of a cell and put in the battery chamber, it will only last a few months. As long as the tab stays on, it can be safely stored for a long time.

[Tom_o]

Mndean - Thanks for the information.  Do you know the brand or part no. of the hearing aid battery?  Should I assume that recalibration is not something to be tried at home?  Is it expensive to have done?

[Mndean]

As far as brand or part number, I don't know it, but they are widely available - check drugstores and the like. Take the old battery with you to match the size.  
 
 Recalibration requires employing a knowledgeable tech at a fair price, or a f

[Rick_oleson]

The part number is 675.  There are several brands, you can find them at any pharmacy including the pharmacy counters at discount stores.... they are sold as hearing aid batteries, in multi-packs of from 4 to 12 or so in a pack.  Typically the cost is

[M_currie]

I have found with my T3 that hearing aid batteries work well with an offset of two thirds of a stop (two clicks down on the ASA dial).  So, for example, for ISO 100 film, set it to 64, for 400 set it to 250, and so on. The offset is the same for

[Tom_o]

Thanks for all the comments.  I got the 675s and they work great.  An otherwise reputable camera shop had told me years ago that there was no effective battery replacement and that the camera was essentially obsolete - might they have been hoping I'd bu

[Hovaness]

The recalibration for silver cell voltage is not a big deal if you are comfortable taking the top off the camera. The two adjustments required (1 potentiometer and 1 linkage positioning screw) can be made without further disassembly once the top cover of

[Reborn7]

Hello Hovaness,
can you give more information on disassembling the top cover and more details on the adjustments needed ?

[Hovaness]

To take the top cover off, you will need a friction tool to get the cap off the win lever and a small pin face tool to unscrew the shutter speed dial retainer. The Rewind knob unscrews in the conventional fashion. I have attached some information on the