How do I charge my VEC012B Jump Starter?

To charge the internal battery on the VEC012B: Connect an extension cord to the jump starter and plug other end into AC power (wall outlet). You now see a circular pattern in the display on the jump starter Press the "On/Off" button so the display reads: "000" Press the "2/4/6" button one time to start charging the jump starter The display indicates the charge rate in Amps and when fully charged reads: "FUL" During the charge, the charger displays a "0.0" reading indicating the chip is analyzing the charge state; this can last for minutes before resuming charge or going to a "FUL" display