[Leica] meter batteries

["Douglas McLernon" <dhwsmc@eircom.net>]

Given the discussion on meter batteries for the M6 I should like to quote
from the documentation that came with my Bronica SQAi-AE metered finder.
Previous editions of the Bronica used a six volt cell to power the shutter
and meter but the SQAi changed to four 1.5 volt .
"the lithium cells have been a disappointment for use with Bronicas. The
performance of lithiums vary greatly, as there are several types. They can
be engineered for high amp draw,  and lower shelf life; or low amp draw but
longer shelf life. They have the potential for the highest energy density
per volume of any low cost cell, but the trade off has been made in
"consumer" applications for long shelf life.  This allows these cells to be
terrific for hearing aids and pacemakers ....but poor for an intermittent
high amp draw requirement like a Bronica".

It is necessary to point out that the SQ series have electronic shutters
rather than just the meter - perhaps someone with more electrical knowledge
than myself could comment.
Regards,
Doug,
Dublin, Ireland