With the Nikon EH-62E AC Adapter you'll be able to operate your Nikon Coolpix S550 Digital Camera from an AC power source.
This is ideal for long shooting periods when you are close to a power source or for downloading images to a computer, so that you do not have to work off the camera...
Canon ACK-800 AC Adapter Kit for use with the following cameras:
PowerShot A400 and CP-400 Bundle Kit
AC adapter/ battery charger for Canon's EOS D30 digital camera
Fits D30, D60, Digital Rebel, 10D and 20D.