Can you guys interpret this?

"* Runs fine with some RCR123A, but not recommended by manufacturer"
http://www.shiningbeam.com/servlet/t...h-N3-II/Detail

I hear that the CR123A batteries help put out more light than AAs, but I don't want to use throw-away batteries. What will happen if I use rechargeable CR123As? Are they saying I need batts w/a circuit to prevent overcharging?