When I started out with this I had 2 cases, carried 3 batteries and 6 carts to work. I always wear shirts with 2 breast pockets and I wasn't to overburdened. Then I got a pass-thru so I a started carrying that. Then I'm at wal-mart and found an ac adapter that worked with the pass-thru and started carrying that. Then I started carrying a couple bottles of juice. Well that wasn't enough because I wanted more variety of flavors so now it's 5 bottles of juice.....When my gear exceeds 10lbs I'll stop adding stuff. 