Better than other cases I've tried. Not waterproof, but I wasn't expecting that at this price point. The clamps haven't broken after 2 or 3 opens and closes, which puts them ahead of most. The 5 battery size is odd but if you are using a device that runs on 2 batteries and you are using them in sets of 2 then I think it evens out. However, the layout also works well with 1-4 batteries. They won't fly around unless you have 5 pieces. So they offer more protection than the "magazines" I've seen, but aren't really break resistant. More than enough to fit spares in my work bag so far. The case has not yet opened by itself. The batteries were not damaged in my overcrowded work bag. Good protection for the price. Better than most.
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