sorry if this has all ready been asked. been thinking of getting a new gen mod. I've been wondered if I have to take the batterys out when going bed? is it safey to leave the batterys in over night?I know you can't leave it charging over night.
I leave mine in but if you're worried remove them. It wouldn't be a question if the mod had a built-in battery so risk is likely the same, next to zero.
The only time I take batteries out is to replace them. I can't see why a battery would go thermal just sitting there if it had been working fine previously.