Nokia AC-3U Travel Charger - Retail Packaging - Black The AC-3U is an ultra compact and very portable charger that supports muti-voltage operations at 110 or 240 vac. The AC-3U is also energy efficient and will not use much power when in standby mode. this Nokia AC-3U travel charger you can get the charge you need to stay connected. The Nokia AC-3U Travel Charger. The AC-3U is an ultra compact and very portable charger that supports muti-voltage operations at 110 or 240 vac. ^The AC-3U is also energy efficient and will not use much power when in standby mode. ^this Nokia AC-3U travel charger you can get the charge you need to stay connected. ^The Nokia AC-3U Travel Charger.