I guys I have the VandyVape Pulse BF 80w and have 2 x 20700 Batteries from my iJoy mod, but they don't last even 2 hours in this mod ...... I lend a Sanyo 4000 MaH with 15A from a friend and that Battery lasted me 7hours before I had to replace it ...... now I am replacing batteries every 2 hours. Look I know my iJoys are clearly not working like it should anymore, end of life maybe cause they are almost 2 years old. But I am looking for a Long Lasting 20700 battery as I like 0.32 Builds@ 40W cause I like cool vape. What can you guys recommend? Would be appreciated as I need to buy today still