Glorich ACK-E2 ACK E2 replacement AC Power Adapter Kit for Canon Rebel EOS 5D, 10D, 20D, 20Da, 30D, 40D, 50D, 300D, D30, D60 Digital SLR Cameras

Camera accessory spot on to requirements

The product will power the camera fine and the supplies battery foot fits well. The biggest issues is how noisy the power supply bricks. If you try to connect your cannon camera to a PC while powered from this adaptor the camera continually connects and reconnects (not the case with a battery). To see what was going on I connected the USB cable to an oscilloscope and found 500-600 mVpp voltage transients on the data lines, these are not present with a battery. The source of this noise is the cheap switch mode power supply (the noise is seen on the power brick output) without adequate filtering. While this noise doesn't appear to affect the standalone camera operation so far.... I would not like to trust the power supply, it may cause random crashes.I am only keeping this because of the connectors and I will upgrade the PSU.

The review detailing issues with electrical noise and the USB connection not working when using this power supply are correct. If you plan to connect via usb, avoid this power supply.