Hahaha yeah if you're using it in the 80-90w range you're gonna rip through it in a few hours. I get a good 5-6 hours between 50 and 60 in temp control with a 115w warm up. But that zip charger is about the only thing making the 900mah worthwhile for me.Good thing it has zip charging. Hit, hit ,zip. Hit, hit, zip....