The battery Life is great...I get about 6 or more hours of hard use...I also use rechargable batteries in all my gear.

My Crown  Cm-311AE didn't need any modifications and plugs right in. (I bought 2 one as a backup)

This mic is IMO the best headset mic you can get (even above the Countryman and Samson

and a few others that Line 6 recommends)..I use it in small environments all the way up to

big mega shows and fairs and festivals as an opening act with my band....THis is the same mic

Garth Brooks, Justin Beiber and a whole bunch other artists use so you know it's got to be a

workhorse and dependable.

I have no problems or regrets getting this unit and I recommend it to everyone. as well as their wireless guitar systems

I've had no problems or drawbacks. THe ONLY complaint I have with the mic is that it slips and I find myself

moving it back into position more than I should be. That would be my only complaint.

The noise cancellation and headroom on this mic is unbelievable, better than any of the others I have tried even better

than the stock mic that comes with the XD-V70HS..

Hope this helps...