Deal Extreme also agrees with hoogie.
"- Product print '600mAh', the exact capacity is 350mAh"
"- Product print '500mAh', the exact capacity is 305mAh"
Apparently their factory's meters are calibrated to detect in "Fire-mAh". (instead of real world mAh).
I think most battery companies overrate there products...
Audio manufacturing companies do it all the time with wattage...
Maybe they figured out were onto them, and went with new labeling that more accurately states the mAh for this run.