Juiceboxs JBDC-45 is a rapid charger that works with all standard v-mount and gold mount batteries. It connects and charges via your batterys d-tap port and, with a 4.5 amp output, charges batteries very quickly. The JBDC-45 detects when a connected battery is fully charged so it is safe to leave batteries connected indefinitely. The chargers LED light glows red to indicate when it is charging and glows green when a battery reaches full charge. The JBDC-45 accepts between 120 and 240 volts and is safe to use with all power outlets, including North American, European and Australian power receptacles. Please choose your preferred power cable. Both North American and European style cables are available.