I just read this info on battery safety and selection. Its the best info I have read about batteries so I thought I would share it on here- https://www.softvapes.co.nz/e-cig-batteries I am a newbie and while I am not ready to use mods with external(is that the right word? lol) batteries, this would be my 'go to' info when I am. So go check it out and let me know what you think.