Tactical flashlights cannot hold a battery while installed as a gunmod #2
Description
This is the case with all gunmods, in the stable 0.G release and (as of the time of writing this) the latest experimental version. However, currently it affects tactical lights the most, those being the only ones with an implemented battery requirement.
If installed onto a gun with a battery still in, the flashlight can still turn on (and, presumably, shine a light), even though it has nothing to drain on, technically. It then uninstalls into two items: the flashlight and the battery that was in it, with its charges intact. (Various conditions of drain and reverting upon lacking enough charge have not been tested.)
A potential workaround might be to "craft" an "empty" light and a battery into a "loaded" light, with its own pool of energy to drain from. This would, in theory, avoid requiring a pocket and a battery.