The ammo boxes are great for storing all size lipo packs. I have two the smaller for my field box that I put vertical dividers in to allow storing the packs end up. I mark the packs with green and red squares of tape on each end. I store the fully charged pack green end up. Once used I put them in red end up. Works great I can get 6 - 8 packs (4S 1800 - 2800 mah) in the case. The big one is for long term storage of old packs that I am waiting to dispose of.
Best, DennisT