While I still think that the Nitecore Intellicharger i4 is one of the best chargers available… the Efest Bio v2 gives it a run for it’s money. First off… the Efest Bio v2 intelligent battery charger can charge battery sizes from 14500 thru 26650. And, other features include 0.5A, 1A , 2A charging modes, CC/CV charging, reverse-polarity protection & dual USB power out. Each of the USB ports can supply 0.5A & 1A! Why not charge your vape and cell with the same charger? That’s pretty bad ass if you ask me. =) This is definitely a great option if your in the market for a good battery charger.