Hi this is my first post. I made this account solely to post a reply to a person who cooked 3 18350 batteries in a nitecore i4 charger. I just ordered one and have the box next to me. 18350's are not compatible with that charger. Just 18650 and whatever else is listed on the side of the box. But I can't tell them this information because I can only post here. So. Yeah. Don't charge 18350's in a charger not compatible or your battery will be toast. They don't last that long anyway. I busted open a laptop battery and there were 9 18650's inside. Yay.