NP-F Battery Cover

thingiverse

You'll notice there's no battery covers included for NP-F type batteries. The contacts are actually embedded internally, which is great because keeping them out of harm's way when storing your gear in a bag or case is a good idea, especially if you're shooting in a sandy environment like a beach. I'm not sure if Sony brand batteries come with their own covers, but mine from DSTE didn't, so if you want a cover and don't need a holder to draw power from the battery, this is what you've been looking for.