So I know that when using mechanicals your not supposed to cheap out and buy the crappy batteries from just anywhere. I hear that trustfire batts, even though they are protected, are not great. Ive heard that Efest batteries are good, from e cig city #4 my local vape shop. I have some more 18650 AW IMR batts from e cig city as well but theres no name on them. The only way to discern them is their color and size. They are red. Now my local vape shop is out of 18500 or 490, whatever, size batteries, so what should I look for when searching through amazon or other vape sites for batteries? Just AW IMR batteries? Ive read that these are the most advanced and probably the safest batteries (as safe as LI-ion can get) available. On amazon they have some Panasonic and Tenergy batts that come up when searching AW IMR, but I just wanna be safe. Whats your guys' thoughts on the best place to buy batts and which are the safest? thank you fellow vapers