I just really hate buying D batteries.
These work exactly as advertised- they'll allow your AA batteries to fit where D batteries normally do. However, as a reminder, they do not give them the same capacity that D batteries have in comparison to AA. It really is just a shell to make something fit. With most batteries I've used it works very well for this, and there's not a lot of movement- but sometimes batteries are prone to slipping out if not secure within the device, so be mindful.
Rating: 5 stars