battery charger(n = noun.artifact) charger - a device for charging or recharging batteries; Array
is a kind of device

a battery, assault and battery, automobile battery, b battery, battery, battery acid, battery powered, bunsen's battery, c battery, car battery, charger, dry battery, electric battery, flashlight battery, galvanic battery, lead-acid battery, nickel-iron battery, quartz battery, solar battery, stamp battery, storage battery, voltaic battery, water battery