Check the web as many find the "hearing aid batteries" provide the correct
voltage
but just need spacers above or on the sides to fit correctly. You can buy
them
in blister packs for only a few bucks.
Nikon Photomic FTN battery solution
Great site on "classic" camera battery adjustments
Camera battery replacement
trick and old camera repair
Weird small batteries, U.K. company
K battery, KK - 4.5V, 538, 7R31, 7K31, RPX31 - find
them here
Pocket Instamatic 50, Pocket Instamatic 60, Trimlite
48,
Pocket Pak and Autopak, Minolta 16
(The site is
there, but he no longer has the K batteries. )
U.K. battery adapter seller PX645 or PX400
1.35V MR-9 PX625 MRB625 PX13 H-D EPX625 Mercury Cell Adapter
MediaJoy has list of camera batteries and their replacements
MRB625,
MRB675
and
MRB400.
These photo replacement types only have two air holes, rather then the 7 in
standard hearing air replacements.
The hearing-aid batteries need more
power over a short time rather then a lower drain over
a long time and the
two holes allow longer life for the low drain light meters.
Also the newer Wein RM400R direct replacement 1.4 volt air cell battery for the 625 and 675 batteries.
Replacement idea for mercury batteries - cheap-o
Real mercury batteries - A google search PX625.com is gone
Chinon replacement batteries (from my Chinon site)
http://www.criscam.com -
PX13 and PX625 mercury cell replacement adapter
They make replacements for a few of the PX28, E544, PX13, PX625,
Pentax Spotmatic battery, PX27
Keep the adapter, just change the inexpensive
battery !
More hard to find replacement batteries like the numbers above and more
Ricoh battery replacement list
Miranda camera battery replacement page
Advanced Battery (tons of types)
Battery dangers - ingestion, warning parents!
Comprehensive Battery Conversion Chart