I carry flashlights in my cars with alkaline batteries in them. Have never had a problem with alkalines leaking/exploding in the heat or cold. Over the last few years I have been buying quarks, fenix lights, zebralights, olights, nitecores, the sort. All these take lithium primaries, Li-ion rechargeables, and NiMh rechargeables. Can any of these batteries be safely stored in a car in the middle of the summer or the middle of the winter? I believe the lithiums Li-ions are surely out, but am unsure of the NiMh batteries. Also, am I risking anything with the alkaline batteries being in the car?