cannot use them after this date and it says to take out the battery before drying your hearing aid why is this required every time you put them in the beaker"
"hello...
the date means that they should be sold by then... they will work as long as the crystals are a definite orange colour. they should be discarded when they go off-white colour. If the seal is intact until use there is no reason they shouldn't last a long time in storage.
~The batteries have a degree of moisture in them. You can leave the batteries in but they might lose a little life. Lots of users don't bother to remove the batteries...
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