I have size 13 battery zinc air for my older V90-SP aids and 675 zinc air for my P70-UP aids and put in Phonak hearing aid dryer for 6 hours. Measured the hearing aid case with temp laser probe and shows 110F. No issues.
Great, but battery breakdown doesn’t work like that - they get hot from the inside when the reaction starts running away. Making them hot from the outside probably just cooks off the available fuel and the Oxygen within the cell can only be replaced at a certain rate. If you want them to burn faster, you need to enlarge the holes. Please avoid this though as we don’t want to encourage cell/hearing aid damage.
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