Anyone know the mAh rating of a regular 9 Volt battery?

Discussion in 'Tools Of The Trade' started by JRS7, Feb 12, 2008.

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  1. JRS7

    JRS7 New Member

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    Just got a new Samson Wireless Mic that eats through 9 Volt batteries a little (a lot!) faster than I would like. Plan to try some rechargables, I have found a rechargable that advertises it's for use in Wireless Mics....the mAh rating is about 305.

    Anyone know the mAh rating on a Duracell or Energizer 9 Volt? I know how long they will run and that would give me an idea of how long the rechargable would last.

    Thanks in advance.
     
  2. JRS7

    JRS7 New Member

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    With some more searching answered my own question, Duracells are 580 mAh......twice the capacity of the rechargable.
     
  3. erniejade

    erniejade Member

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    I tried rechargable 9v in my system and it would allways show up battery low. That might be why!!
     
  4. unlimitedsounds

    unlimitedsounds Active Member

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    HMM

    WE have a sure wireless here where I work (a school) and they use 9v rechargeables in them and they dont last very long.. When I use it I replace the rechargeable with a regular 9V :)
     
  5. bjojade

    bjojade New Member

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    The reason rechargeable batteries will show low battery is that many of them are not actual 9 volt batteries. They may only be 7.2 volts at full charge.
     
  6. RicardoM

    RicardoM New Member

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    With the thonge. If it hurts, it is full charged. If not, then change it. :lol:

    J.K.
     
  7. Jon Bruce

    Jon Bruce Sanity Checker

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    Define
    What kind of batteries?

    I get about 3-5 hours of intermittent use from a battery with Shure wireless and I use a new ones every time.

    and I use Procells.

    Obviously not a great example. Here is a better one.

    At church, we change the batteries every Sunday before the services start with FRESH, NEW ones. ALL the old batteries go else where even if the mics were only used a little.

    We use Procells, not because they are the greatest, but because they are very good, and very consistent.


    It is the cost of doing business... Having gear that works correctly is mission critical.
     
  8. djdons

    djdons Member

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    I have seen some models of wireless microphones that use rechargeable battery packs and have a stand for placing the transmitter into that allow the battery pack to be recharged. Not sure of the manufacture but AKG does seem to pop up.

    There are 9v rechargeable batteries available that will actually put out the required 9 volts instead of the 7.2 volts that come out of most. www.supremeaudio.com/battery.htm has the 9 volt batteries will put out more than the 7.2 volts as well as a few other styles.

    Of course our vendors might be able to help out as well :wink:
     
  9. DJPete

    DJPete New Member

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    We run Tysonic NI-MH 200MAH -- They have an extra 'cell' so they start @ 9.2V --- I've run them for 4-5 hrs in an Audio Tech system.

    ThomasDistributing sells them --

    Our Church just purchased 4 x Sennheisers + 8 x Hearing Assist units all use AA - and started complaining about having the high $$ of Alkaline Batteries --- At least the Sennheiser's have battery meters (bars) so we can reasonably use the lifespan of the alkaline before changing it! (I'm still working on getting them to move to rechargeable!)
     

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  10. Chris Wagner

    Chris Wagner School Dance Moderator

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    Are you leaving your batteries in your microphone between shows?

    Try removing your battery following each show... you'll be suprised at how much this might save you.
     
  11. bjojade

    bjojade New Member

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    If you look on the side of that rechargeable battery, you will notice that it is rated at 200mah.

    As stated earlier in this thread, a standard battery is rated at 580mah. That means a normal battery will last 3 times as long as the rechargeable.

    If you're getting 6 hours out of a regular battery, you will only get about 2 hours out of the rechargeable. If you're doing more than a 1 hour performance, you may run out of battery power before the show ends.
     
  12. DJPete

    DJPete New Member

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    It may only be rated @ 200MAH, but it lasts for 4+ hrs in my Audio-Tech Mic --

    I've used Alkalines that I started swapping @ the 3-4 hr interval (for fear of them dieing) -- I'd rather just put this battery on the charger ---
     
  13. bjojade

    bjojade New Member

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    If that rechargeable works for you for 4 hours, then you should be able to get 10-12 hours out of a regular battery.
     
  14. DJPete

    DJPete New Member

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    You should ---

    BUT -- Nobody will take that risk!
     
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