Thanks for the respnse, CelticCross74! I did buy the 3400mAh Orbtronics instead of the 3500's because Eagtac's site says this light's cells should be no more than 68.5 mm, and the 3500's are listed as 69 mm. Not much difference but I am new to this and did not want to possibly damage any cells. The 3400's seem to do pretty well so far. I may upgrad in the future if you are sure they will fit. Thanks for your response and info!
jgmoose