Electric devices + batteries
My suggestion is to make refilling less annoying for our lovely usefull devices.
Because right now we need to empty out charges from our storage (or place at hand slot) and next we need to empty out device from battery (even more annoying with aa batteries because they stack).
My suggestion is to make devices into 2 different, example: flashlight into 2 different items as 'flashlight-no battery' (standard one) and 'flashlight-with batteries'.
In that way 'flashlight-with batteries' will have charges slots instead of battery slot.
Crafting recipe: Flashlight-no battery + 4 x AA batteries =Flashlight with 4 charge slots instead of battery slots. Plus from this Flashlight will have still same deterioration and will be less annoying to refill.
Going along this it can be just added 3 new items because old ones can work same as right now:
All with batteries