Still, to tell the difference between a real mercury cell for your OM1 and a
counterfeit, you need a true voltmeter, not a common 'battery tester'.
What might be really useful is a home-made 'battery tester' using a
multimeter and an empirically derived resistive load to tell us if that 357
cell is close to failing in our OM-2S/OM4(T) bodies. We already know that
the body's built-in tester won't warn of of impending demise.
Chip Stratton
cstrat@xxxxxxxxx
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