An external power source. My old Elph had a wall power supply that helped. But I also could remove the memory card to put in a reader so I never needed the camera to get the pictures out.
I have a Canon Powershot SD400 (Digital Elph). It's over a year old, and I'm having trouble with the mode switch. Regardless of where the mode switch is set, the camera stays in video mode 9 times out of 10. Sometimes I can get it to take pictures, but it takes fiddling with the switch. Also, while trying to upload my pics to my computer, when I finally get it in view mode, the camera shuts off before I can upload the pics. Has anyone else had this problem? To send it to get fixed will cost at least $99!!!