I made this for KV and from the sound of it not a moment to soon. It features PTR08100W chip Dual 18650 5A Switch Voltage display Wide-Output Voltage (3.23 V to 6.0) Efficiencies Up To 96% Undervoltage Lockout (UVLO) Output Overcurrent Protection (Nonlatching, Auto-Reset) Overtemperature Protection I know the batts are only 18350 I dont have 18650 but needed to test this unit out before I send it to him P.S. KV Tank not included