More and more single 18650 mod comes with features such as TC Mode, TCR Mode. There are many battery type in today's market like 21700, 20700, 18500, 18650, 18350. Single 18650 mod has always been a popular option for us. I'll show you best single 18650 mods 2019 as following. Best Single 18650 Mods 2019 - 1.Ehpro Cold Steel 100 TC Box MOD Ehpro Cold Steel 100 Box MOD, which is a super powerful and portable box MOD co-designed with AmbitionZ VapeR which is a famous and professional Youtube r...