A Panasonic BQ-390 is a battery charger capable of charging NiCd and NiMH rechargeable batteries. The device can charge up to four rechargeable AA batteries or two AAA batteries. Panasonic recommends that this charger only be used to recharge Panasonic-brand rechargeable batteries.
Insert batteries into the charger. Follow the +/- directions in the battery bay for proper placement.
Plug the power adapter jack into the charger outlet at the top of the charger.
Plug the other end of the charger into an electrical outlet. The LED light on the charger's upper left side will blink to indicate that the batteries are charging.
Unplug the charger when the LED light becomes solid. A solid light indicates when the batteries are fully charged. The charger typically can charge two AA batteries in less than two hours.