Wireless mic FAIL

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Message to all in this thread. If your wireless mics uses AA or AAA batteries get Energizer Ultimate lithium batteries for them. They cost more than twice every other batteries but they are worth it. They will last a long time and will keep their energy a long time when bought new and stored.

Although it may seem wise to buy the most expensive, newest batteries you can find, I buy the store-brand Costco or BJ's Wholesale Club batteries - at around $8 for 48 of them, there's no excuse for not putting fresh batteries in my microphone before every event. I don't need them to last a long time - just until the end of the event.
 
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I used to put fresh batteries at every event but then started thinking I've got a mic that supposedly let's me know when to change batteries...according to the pamphlet I'm supposed to have a good cushion from when the light turns red to going dead...lesson learned
 
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Rick,

How would the transmitter know if it's being used or not? My Shure ULX doesn't power down either. There is always some sound going through it (background noise).

I dunno but I'm fairly certain my Sennheiser does power down. Have tried it with the ATs.
 
I know on my Audio-Technica 3000 series mics, that the receiver will auto-mute when the mic is either turned off or batteries removed. The transmitters send a signal that must be received for audio to be produced, so they stay quiet if a battery dies. They also transmit battery life to the receiver so even if the transmitter (handheld or bodypack) is away from you, you can see the battery level.
 
I generally replace after every two gigs. If the mics stay on (even using mute) I can get at least 8 hours from them, probably 12 or more, but since I replace after 2 gigs I do not know their total time. I prefer the following batteries: http://us.sanyo.com/eneloop
 
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I always keep spare rechargeable batteries handy
plus I buy a 10 pack of Standard batteries for the wireless mic just in case
 
I only use my wireless for toasts, and the occasional speech.
So it takes me SEVERAL gigs to use just an hour of battery time.

I used to buy batteries from the Dollar Store, and get TWO 9-volts for a buck.
Use them for ONE gig, and throw them away.
(which is about all you'd get out of them)