I have a packet of Rayovac 675 zinc-air batteries ("hearing-aid batteries", according to the packet).
They are nominally 1.45V, but I measured them at 1.3V or so with my multimeter, including new ones with the seal still on.
I haven't had them that long, and the best before date is 10/2017.
Is this what I should expect? And once the seal has been removed, will replacing it help slow their self-discharge?
Thanks,
Daniele