The UNC was originally listed as 1300 mah but after some companies started testing them they were showing up at 1100 mah and so they started advertising as such. I was reading in the Liberty Flight forum that they weren't a true 3.7 like the Eastmall Riva's and the SLB Riva's. They fell somewhere in the middle of the EGO's 3.2 and the Riva 3.7 range.