I have a question about using rechargeable batteries in wireless devices such as microphones and transmitters. I was told by a sound company that it's not a good idea to use them. I would like to know why or if they're full of it. Rechargeable batteries have come a long way and are useful in power-sucking digital cameras so what's wrong with wireless audio equipment? Do they not last long enough? Is it worth the money in the long run (taking the hydro cost of recharging them into account) to change over from standard batteries and what type should I look to buy (2500mAh)? Besides all this, it would help save some landfill space. Our church spent almost $500 in batteries last year and I think that's a little insane. Sorry if this is in the wrong section. It kind of has to do with microphones and I didn't know where to post it. Admin, please feel free to relocate it.