This is great and the shipping was incredibly fast!, The plastic is quite tough, so I don't think that it will ever break. AA batteries fit somewhat tightly in the adapter, but I think that's a good thing. I like that you can choose to use either 1, 2 or 3 cells in this adapter, depending on your capacity, weight or battery cost needs.
Good strong quality. 3 AA rechargable battries NiMH fit nicely together.