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Thread: Hearing Aid Dryer

  1. #21
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    Quote Originally Posted by Um bongo View Post
    I'd say a bigger reason was that batteries discharge far faster when they are warmed. Significantly every 10 degrees celcius warmer will double the speed of the chemical reaction inside the cell, whether that voltage is used or not. Any excessive heating will diminish the overall life of the cell.
    Several years ago I tested the life of my batteries. First I left the batteries in the HA with the door open while they were in the dryer, the results were that the #13 batteries lasted 14 days. Next I took the batteries out just before putting the HA's in the dryer and the batteries still lasted 14 days. Finally I took the batteries out of the HA's and put a piece of scotch tape over the holes on the batteries each night and the results were they lasted 16 days. So I didn't see any difference between life expectancy of the batteries unless you taped the holes and cut off the oxygen each night and then it only gave you another two days.
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  2. #22
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    Tried that with the Mercury free ones too?
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  3. #23
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    Quote Originally Posted by Um bongo View Post
    Tried that with the Mercury free ones too?
    I did it about a year and a half ago.
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  4. Default

    There really hasn't been any good studies to show if heat will discharge the batteries sooner. According to everything I've seen, it will not.

    Also the Hal-hen dryer is junk. Go electric. The Dry & Store Global II is what professionals use, so maybe not that high end. The Unitron CleanDry is cheap and has good features.

  5. Default

    Dry 'n Store Zephyr is what I use. basically the same as the global, but minus the UV light, which you really don't need. Had it for 5 years or so now....still works perfectly.

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    Yeah that's a good one too. Although its debatable if the Dry-briks are worth the extra expense.

  7. #27
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    Quote Originally Posted by edatlanta View Post
    I have been using the Serene Innovations ReNew Hearing Aid Dryer. It is plug in and requires nothing but electricity to work. Put the HA's in it and push the button (two buttons if you want to turn on the UV Light which runs for one hour).

    For the past year and a half I took the batteries out each night and a few weeks ago I got lazy and just opened up the battery door and left the batteries in during the night's drying. One thing I noticed over a 3 week period, the battery life decreased from 7 days to 5 days. I then started taking the batteries out at night and life went back up to 7 days.

    Does the warming involved with the electric drying decrease battery life?
    Yes. According to powerstream.com, zinc/air H/A batteries lose life if they dry out or get wet.

    "The electrolyte is an alkali hydroxide in 20-40% weight solution with water. One disadvantage is that since these hydroxides are hygroscopic, they will pick up or lose water from the air depending on the humidity. Both too little and too much humidity reduces the life of the cell."
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    Thanks for this enlightening thread, everyone. Bruce, I appreciate the detail. I've been using some free demos for a couple of months, but am going to get new ones, so want to keep them working properly for as long as possible. The audio said definitely remove the batteries, but did not say why. If someone gives detail like Bruce just did, it's much better than just saying to do it. I also appreciate the post about the UV affecting the tubes. I have a Quest Perfect Dry Lux that I got at Costco. It was an excellent price there, around $40 as opposed to $65 on Amazon.
    Last edited by Dash; 08-28-2016 at 01:03 PM. Reason: clarity

  9. #29

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    I use disposable Dri-Eze dehumidifier canisters. They last six months and cost me less than $5, and they work surprisingly well.
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  10. #30

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    Mine is an Hal-Hen. It's been fine for my purposes. I've read that the electric ones can go wonky and cook (melt) the HAs or actually catch fire.

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