My only experience is with the gray trustfire cells from DX. When I dug my lights out a couple of weeks ago, the cell that was in it the case was still charged up and gave me another two hours of blinding goodness. These cells are two years old, the last time I had charged it was in March. Pretty good performance for the price if you ask me.
Last edited by mercator; 10-15-10 at 02:24 PM.
Reason: corrected to conform with reality