Got mine yesterday, have the same setup you have except 900mah bats (all less than 2 months old), my battery lasted about 2.5-3 hrs though I was constantly vaping - But a few things I believe turns this around!
1 - Never felt fully satisfied with the SuperEgo after the 3rd week, first couple weeks was doable to get mostly off cigs, now very happy at about 4 - 4.2 volts!
2 - When I received the Booster I used a new cart that was stuffed tightly with poly fill, this caused a lot of issues with higher volts - wouldn't wick fast enough, so I was puffing more often - Problem solved when I did a cart mod using a straw down center and about 1/4 of the usual polyfill - Setup is stable, wicking is great, and TH and vaper greater with just little hits
3. My latest battery I started last night used for 2 hours and so far today 3 hours, equaling 5 hours and still going.
4. PV is not glued to my face anymore, sucking frantically for some semblance of the analog sensation
4. So very happy except for concerns transporting this miniature baseball bat - Thinking maybe a cigar tube might work, all suggestions welcomed!!!