Energizer Ultilmate Lithium Batteries?

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My sennheiser mic is on for at least 7 hours a week, sometimes more. I replace the batteries with full rechargeable before the event and fully charge the old ones for back up. Some events we use more mics.
By starting each event with fully charged batteries, I don't have to worry about the batteries quitting during the event. I buy new rechargeable about once a year.
 
Turning your mics off during the show? Wow, never heard of such a thing. Ours go on at around 6:00 when we start... and they stay on till midnight... in mute often, but always on cause we never know when we need to talk.

I, too can get several months out of a wireless mic battery
of course, I have a wired mic mounted on my rig
so the wireless is only used for a couple of minutes at each job

never tried the Ultimates Hugh...
in fact, I go with whatever is on sale.
 
I always turn mine off if for no other reasons than if it drops and I have the mic hot on the mixer..... well... it's not pretty.

then theres the problem with saying the wrong thing, and forgetting the mic is turned on