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Thread: Rayovac Extra Advanced, thumbs up

  1. #1
    Join Date
    Aug 2010
    Location
    Central Alabama
    Posts
    2,621

    Default Rayovac Extra Advanced, thumbs up

    Bought some Rayovac Extra Advanced batteries from the forum host, localbattery.com, and they are the best batteries I have tried.

    I normally getting 2-3 days and sometimes 4 days. With the first pair of these I got 6 days, with a lot of streaming. And, I swear, the hearing aids seem to work better (crisper highs). I wonder if my old batteries were low on voltage? It doesn't seem logical that the hearing aids would work differently.

    Anyway, I will be buying these as long as they are available.


    New! 2014 ....2016
    Freq . L/R .... L/R . . . Word Recognition and Equipment
    250 .. 25/20 .. 40/45
    500 .. 20/25 .. 30/40 . . . SRT L/R = 35/65 , WRS @ 35/85 L/R = 64/56%
    1000 .30/40 .. 35/60 . . Kirkland 5.0 Costco (December 2014)
    1500 .50/55 .. 55/65 . . Phone Clip+ (May 2013)
    2000 .55/70 .. 60/75 . . TV Transmitter (Dec 2014)
    3000 .75/90 .. 95/100
    4000 85/100 . 90/90
    6000 .90/100 . 90/105
    8000 .80/90 .. 90/95

  2. #2

    Default

    Quote Originally Posted by Don View Post
    It doesn't seem logical that the hearing aids would work differently.
    You're right. It doesn't.
    250 500 1K 1.5K 2K 3K 4K 6K 8K Costco KS7
    R 25 50 60 60 60 50 50 50 65 SRT: 55dB WRS: 84% @85dB
    L 30 60 60 60 60 55 60 60 70 SRT: 60dB WRS: 88% @90dB

  3. #3
    Join Date
    Dec 2009
    Location
    Wales, UK
    Posts
    3,473

    Default

    Quote Originally Posted by corona View Post
    You're right. It doesn't.
    Not only voltage level, but voltage stability issues come into place - lots of aids use potential splitting to invert/oscillate the supply voltage several thousand times a second and then effectively double the voltage by moving the zero volts to the minus peak. This requires a battery with a stable output, and makes the difference between the difference between an average battery working at 1.1/1.2 Volts vs. the new Rayovacs working at 1.45 Volts potentially have a 0.7V difference in potential.

    0.7 Volts more is huge within a hearing aid - even if you just consider dealing with the internal resistance of the components - before you start to consider the potential for extra processor cycles etc.

    So yes - squeezing the extra juice is very important.

    As an aside I've never understood why there's no application for a twin 312 capsule slightly larger than a #13 - but not much cause it would only need one skin.
    'He who is not courageous enough to take risks will accomplish nothing in life.'
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