Bill,
The place I go to for a battery search is 'batteries.com' You can search by
device or the battery number and manufacturer of the battery.
It's also cool to select 'camera' and 'Olympus' and you'll be surprised how
many camera models pop up!
Good luck,
George S.
> I just received my Pentax 1/21 Spotmeter from ebay. I want to replace both
> batteries, one of which is a common 9V battery. The other battery appears
> to be dead and is labeled "640". Does anybody know if this battery, or its
> equivalent is still available?
>
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