I recently got a hog v3 clone, took it apart checked connections ect. Running a mason 40mm with quad coils running at .5ohms. I used it for a full day with no problems. Thismorning i checked the button wasn stuck and put in my 4 batteries. Then smoke started pouring out of the bottom. I quickly pulled all the batteries out. 2 of the battteries are fried, the other 2 seem ok, but ill check them over before i use them. So my question is why do you think they fried and why only 2 of them? Any help would be great. Btw using ohm life batteries.