I was at Radio Shack yesterday and they were carrying 3.6 V 750mah Tadiran (Lithium) batteries. It is smaller than one 150mah cell, maybe the size of a 110. I have heard that some are flying with three 110's, so wouldn't this cell work, and be featherweight to boot? A few questions though: 1) Is the operating distance decreased? 2) Is the Rx reliable at 3.6v 3) Are the servos unreliable or sluggish? 4) How do they run down? All of a sudden? 5) How do you know when they are close to discharged? 6) are there rechargeable sources? Where are they available? Charged with what? Or is it worth it just to use the disposable ones? Rodger RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]