@ipodsync, the current rating of a power supply indicates the maximum current that it can provide. Current is not “pushed” but “drawn” by a circuit. The Photon will only use what it needs. One word of caution. If you expect to supply the Photon power via the 3V3 pin, you cannot connect a powered USB connection at the same time. If you need to monitor the USB serial, the use a USB cable that doesn’t have power connections.