Batteries are OK to be left fully charged for a few days, weeks even. If its going to turn into months, then its recommended to store around 3.6v. If kept in a light, if possible lock out(undo tail cap for example to break contact). This prevents any accidental activation and potential parasitic drain when stored or in a back pack etc.
:welcome:
I agree.
Just tell anybody who might be using your lights, that they have to twist the tailcap closed and don't do it too tightly.
I was away in L.A. last week and my water heater started dripping into the kitchen a tad, so my GF was there and couldn't see what was what and I told her to go grab a flashlight, which she did and said (Convoy C8) it didn't work for her.
I told her to tighten the tailcap a bit and that worked.
She ended up denting the BT on an LG E1, but she got things sorted out, lol.
Gotta love women. Can't live with 'em, can't shoot 'em.
Chris