Week one: "Hm, well, since I need to order
batteries, I might as well order a couple extra..."
Week two: "Ah, well, since I got those extra
batteries, I might as well order something to put them in..."
Week three: "Better get another charger for all these damn batteries..."
Week four: "Oh wow, great deal on batteries! I might as well order a couple extra... Need something to put them in, though... Hmm..."
... ad infinitum. Welcome to my world.