[Geoff]

martymart wrote:
You would expect to change batteries in a wireless transmitter daily
regardless of phantom draw. What's the big deal?

So far my 500 mah rechargeable 9V's are doing well. Max duty so far
was 6 hours and they had some reserve left. I'm running them in
Lectrosonics 400 series butt plug transmitters on Schoeps and DPA
mics. A battery will charge in considerably less time that it takes
to drain, so one backup per transmitter is adequate.

My customer is a church with no tech staff. Even with daily services,
they could have gone 2-3 days per battery if it did not have to supply
phantom. Daily battery replacement was a pain to them, not to mention
more expensive then expected.

They could call up divine intervention.

The real problem is total and sudden death of the xmtr. The xmtr
would die in the middle of a service when the battery meter indicated
useful life when the service started. Converting to 48V from a pair
of AA bats chews them up fast.
Marty

In my experience churches are the worst for random people popping random
batteries in and out, seldom having a pair of batteries of similar vintage
or even type (" I just put in what was rolling around the bottom of the
cupboard").

A strict regime of replacing with known-new batteries and disposing of (or
recharging) old is called for.

geoff.