I've been EDC'ing a mini mag for the past year and a half now, with alkaline batteries. I'd like to switch to NI-MH batteries to save money, but i'm at the assumption that they are more fragile, that a drop may damage them, but how fragile are they? I work at CSX, so i'm on the ground a lot or laying on it or on vibrating equipment. plus it may drop it outta my holster and hit the ground, being gravel, dirt, concrete, etc. would i be best continuing with alkalines or would rechargeables be able to hold up to this?