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From: jer@peora.UUCP (J. Eric Roskos)
Newsgroups: net.rec.photo
Subject: Re: batteries
Message-ID: <1792@peora.UUCP>
Date: Fri, 15-Nov-85 08:25:03 EST
Article-I.D.: peora.1792
Posted: Fri Nov 15 08:25:03 1985
Date-Received: Sat, 16-Nov-85 09:56:23 EST
References: <486@harvard.ARPA> <1868@watdcsu.UUCP>
Organization: CONCURRENT Computer SDC, Orlando, Fl.
Lines: 36

> My new T-70 is a diffeent matter, though.  It uses two alkaline AA's
> to provide power for metering, shuttter and the winder.  They are
> rated for 25-30 rolls (I think), and I think I'm up to over 20 since
> buying the camera, so it's about time to get new ones.  Then there's
> the small backup battery which is not user-replaceable...

Fortunately, you can see evidence of the batteries in the T-70 running
down long before they actually fail, giving plenty of warning... the motor
starts running slower (especially on rewind, it gets slow towards the
end), and then, when this gets fairly noticeable, the battery meter bars
that come on when you press the BC button show the battery is getting low.
I think maybe that is an advantage of using the larger batteries; it takes
longer for them to run out once they start to slow down, while the long
period required to run the rewinder gives a good load-test of the
batteries, compared to ones that just fire the shutter or advance the
winder one frame.

The small backup battery is interesting, though... does anybody know how
it is replaced?  I took my T-70 apart a couple of months ago to see how
it was all put together, and found that the backup battery appeared to be
spot-welded to the battery clip (though I didn't try hard to remove it, so
I may be wrong).  [I'll bet I see this fact restated for months in
pro-Nikon/anti-Canon commentaries, so let me emphasize: I'm not sure this
is the case, I just didn't want to try loosening it since something seemed
to be holding it firmly in place.  That's why I'm asking.]

PS - regarding the 25-30 roll limit... I can generally get through about
200 feet of film before mine start to run out, so I think that their estimate
in the manual is somewhat conservative, if you use good reliable alkaline
batteries.
-- 
Shyy-Anzr:  J. Eric Roskos @ CONCURRENT Computer (A Perkin-Elmer Co.)
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