Energizer Batteries AZ312DP EZ Turn and Lock Hearing Aid, Size 312, 16 Count

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3 Responses to “Energizer Batteries AZ312DP EZ Turn and Lock Hearing Aid, Size 312, 16 Count”

  1. Grits says:
    5 of 5 people found the following review helpful
    1.0 out of 5 stars
    Absolute junk! (at least this package of 8 certainly is), September 16, 2011
    By 
    Grits (South, USA) –
    (VINE VOICE)
      

    Customer review from the Amazon Vine™ Program (What’s this?)

    Wow! I have to say, this is by far the worst review I’ve ever given any of the many products I’ve reviewed before – and the most unexpectedly bad review, too! My experience in general with Energizer batteries (not their hearing aid batteries) has always been excellent. It is one of only two brands of non-rechargeables I’ll buy.

    It may be that I got a defective package of batteries, but it certainly isn’t old stock (it has a 2014 expiration date). There appeared to be no tampering with the batteries (back of the package was fully intact and the stick-on tabs were all in place). With all that said, here are the …

    Results:

    The first battery lasted less than five full days, and I didn’t even use my hearing aid one or two of those days. Ok, maybe it was just a fluke. I did happen to notice that my hearing aid could be run at 100% without a feedback problem – something I’ve almost never been able to do before. At first I wondered if it was my hearing aid starting to have problems, rather than the battery. I used another brand, and had the usual feedback problems when I cranked it up past about 75-80% volume. That suggested to me that the first battery out of this new Energizer package might have been half-dead when I opened it.

    So, I tried a second battery today. I immediately noticed I again could run my hearing aid “flat out” at full volume with the brand new battery. “Wonderful!” I thought – as long as the battery will last my usual two weeks or so. But I also got curious this evening when I took out my hearing aid for the night and put it in the dryer. I decided to check the battery, and ended up “sacrificing” it with the extent of testing I finally did on it. I only got 1.2 volts out of it after just a few hours of use today (brand new from the package earlier today). I went and sacrificed another brand of battery, also fresh out of the package (a German brand). It was listed at 1.45 volts. It measured 1.4 volts (it has a 2012 expiration date, whereas these new Energizers have a 2014 date). I also sacrificed a brand new battery that was branded with a well-known hearing aid manufacturer’s name on the package (also a 2012 expiration date). My mother-in-law gave me some of hers when she no longer needed the size 13. I’ll just refer to it hereafter as “Btone.” It had no voltage rating on the package, but measured 1.3 volts.

    Of the three brands, only the German battery showed a milliamp-hour rating on the package. I decided to just get relative readings from all three batteries by checking the number of milliamps output with each of the batteries. Apparently my volt-ohm-milliamp meter pulls a lot of “juice” in that check, because when I left the probes on that brand new German battery for just a few seconds, it began to drop. So I checked the “Btone” battery, and it started a bit lower in mA output, and also dropped. This Energizer? It was extremely low to begin with after just a few hours use since opening this morning. With most brands I get at least two weeks of pretty heavy daily use, occasionally as much as three weeks per battery. So just the few hours today should not have been responsible for drawing down the power that much. I left the meter probes on it for perhaps another 30 seconds and it dropped to “0” on the milliamp meter. I then let it sit for a couple of minutes to recover a bit, checked the voltage again, and it was well down under one volt. I stuck it in my hearing aid, and it would not even power up the device.

    Since I got these through the Amazon Vine program for review, I didn’t pay anything for them. So, before finishing this review, I decided to “sacrifice” another of the Energizer batteries, as well as one of the “Btone” brand, both new out of the package. I first checked voltages. Each was exactly 1.3 volts. I then put them on the battery tester setting of the meter for 1.5 volt batteries. The Energizer started slightly down into the “red” (not fresh) zone, whereas the “Btone” started on the dividing line between “red” and “white” (weak, but OK). “Green” is beyond “white” on the scale, and means “good”). Both started drawing down on power when left on the battery test setting, but the Energizer drew down faster. So I then checked milliamps output of each, and allowed both batteries to draw down on power until the needle was just about stationary (both stopped a bit above zero output). Not only did the fresher Energizer (2014 expiration) stop below the “Btone” brand (with only a 2012 expiration date on it), but when I then checked straight voltage again, the “Btone” brand was higher (.5 volts) and slowly climbed just a bit as it recovered from the draw down, whereas the Energizer started lower than .5 volts and never climbed even up to .5 volts.

    I only have a relatively inexpensive meter, and have no way of knowing what the milliamp reading SHOULD be coming out of a…

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  2. David C. Barham says:
    2 of 2 people found the following review helpful
    1.0 out of 5 stars
    So poor I consider it a ripoff, October 27, 2011
    By 
    David C. Barham (Albuquerque, NM United States) –

    One pack of 8 batteries gave less than 5 MINUTES of service. Other packs gave 2 days of service instead of the 4-5 days of service I get from other brands. Expiration date was 10/2013 so that was not the problem. DO NOT BUY!

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  3. Jacqueline "sf/f writer" says:
    2 of 2 people found the following review helpful
    3.0 out of 5 stars
    Came up 2 Days Short, October 5, 2011
    By 
    Jacqueline “sf/f writer” (United States) –
    (VINE VOICE)
      
    (REAL NAME)
      

    Customer review from the Amazon Vine™ Program (What’s this?)

    I’ve been using the Rayovac version of this battery, and thought Energizer would be at least as good or better.

    I was composing a review to say they’re pretty much the same, with the same convenient packaging, handy little plastic stick-ons you can put on the calendar to remind you when the battery will run out, and the fit is just as snug.

    And then, 2 days before the Rayovac would have quit on me, the Energize quit.

    I’ve only used a pair of the Energizers so far, so it could be that was just an oddity. If so, I’ll edit this review, but I wanted you to know that you might not get the same use-life out of the Energizer.

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