I've tried with a battery box, and failed.
These mics simply cannot handle loud shows, but are very capable for quieter ambiences and music.
I ran across this topic and I felt the urge to reply even though no one has posted in it for a long while.
For starters, I disagree with the statement above. They CAN handle loud shows.
I do own the Roland CS-10EM mics. In fact, I have been using them since 2011. They are my go to mics. My experience is they can work without a battery box, but that can sometimes lead to brickwalling issues at various times - and it's hard to say when that will happen. Since 2013 or so, I've been using them with a battery box, at least three different ones. Here is my take on what battery box works more appropriately with it:
SP-SPSB-1 by Sound Professionals - requires a 9v battery and I can sort of recommend this one. The battery life is good for recording and I never noticed any distortion with it. I think all of my recordings with it have sounded very good. However, this battery box is a bit bulky to carry around. Had some issues with it that required me to get it fixed.
SP-SPSB-4 by Sound Professionals - requires a 12v battery and I don't recommend this one for these reasons: the battery life for recording is a bit short than the 9v ones and I've experienced some distortion with some recordings (not all, some). Some sound great, others not as much as I wished.
MM-CBM-Mini by Microphone Madness - requires 3x 3v batteries that total 9vs of power. I totally recommend this one. It is much smaller than the SP-SPSB-1 (a bit comparable in size to the SP-SPSB-4), battery life seems to be very good, and I have not had a problem with it so far where I needed to get it fixed or replaced.
So there you have it, at least three different battery boxes I've used on these things that gave comparable and different results.
I'm not going to stop there.
Not meaning to do shameless promotion of my work, but if you want to hear some recordings done with some of these battery boxes, some are posted around the internet on various videos sites like youtube/VIMEO. Here are the videos where I've used these Roland CS-10em mics. I'll even tell you the sample rates I used, as they varied at various times when I recorded.
https://www.youtube.com/watch?v=enDycCi4tAQ - recorded on a SP-SPSB-1 in 16 bit, 44.1 khz
https://www.youtube.com/watch?v=k9GduxyAUCA - recorded on a SP-SPSB-4 in 16 bit, 48 khz
https://vimeo.com/224576507 - recorded on a MM-CBM-Mini in 24 bit, 48 khz