I am generally happy with the FL-300R I recently purchased, except for the battery life (or lack thereof). I've tried alkalines and lithiums, and neither seems to make much difference. Today I put in a set of brand new lithiums and after a half dozen shots for fill-in outdoors in open shade (but full power), the two lights started blinking on the back signaling time to change the batteries! The same thing happened yesterday with some pretty fresh alkalines, but I had assumed maybe they were not as fresh as I thought. But then today, the same story with freshly opened and well within date lithiums made me wonder if there is something peculiar about the flash unit. At this rate, I'll have to get it replaced or refunded. What has the battery life experience been for others with this flash?