The XTAR VP2 is the most sophisticated charger on the market for both protected and unprotected 18650 cells, as long as similar sized cells including 10440, 14500, 14650, 16340, 17670, 18350, 18500, 18650, 18700, 22650, 22550, 26650, in battery chemistries including multiple voltages of Lithium Ion and LiFePO4 cells. Features three user selectable voltage outputs, three user selectable charge current profiles, and realtime voltage display and charge level display for both channels. Also displays the power/charging status, charge current and mode. Now includes USB charger functionality! When used without an external DC voltage input; the VP2 can be used as a USB power bank by holding the mode button for 1.5 seconds. The VP2 is constructed of a very compact and fireproof ABS plastic housing, with well engineered heat dissipation from three sides. This is THE charger to get if you care about your 18650 or similar cells.