Can rechargeable batteries be used with these?
Can I use rechargeable batteries in the wireless mics and lav transmitters in this series? About how long would NiH batteries last?
I realize this question is old, but thought I would add my $0.02 anyway. Yes you can use rechargeable batteries, and I highly recommend it! After being frustrated over poor performance with Duracell Coppertop batteries, I switched to Energizer NiMH and haven't looked back. The batteries last up to an astonishing 11.5 hours in low power mode and the cost of a 16-bay charger and 32 rechargeable batteries paid for itself after only a week or two of not buying alkalines. If you live in the USA, you should also consider Eneloop NiMH batteries which are extremely popular.
As usual, make sure you use a matching set of batteries. I suggest you avoid timer-based and/or fast chargers. Use a "smart" charger designed for NiMH batteries, and if it takes a long time to charge, that's a good thing as fast charging shortens their lifespan.
7 months ago