Most of the Canon cameras can be used on an external power supply.
The aim of this page is to help those who want to use a non-Canon PSU or an external battery power supply to run their cameras. This is essential for very long exposures, and for scripts that run continuously, monitoring a scene, for example, in a security camera or wildlife setting.
Please could people add in the pin polarity and voltages that their model of camera can run on.
|Camera model||Pin polarity||Stated voltage||Peak current||Waiting||Half press||Full press||Zooming||Playback|
|Monitor on||Monitor off||Monitor on||Monitor off||Monitor on||Monitor off||Monitor on||Monitor off|
|A560||Outer pin -ve||3.15V||720mA||360||70||450||340||500||530||210||150|
|A590||Outer pin -ve||3.15V|
|A720IS||Outer pin -ve||
(4.2V tested - see note bellow)
A720IS note - I'v been trying to solve external AC power supply ,already had some 18650 li-ion cells in pairs (4800mAh) with 4.15V fully charrged. Using it for timelapses and so , for year or so, no problem so far. It can take around 10 000 !! shots with monitor turned off. Edit:Hi, here how to build an external Akku with 18650 for Canon (german). And it takes 10'000s of shot's with monitor turned on!
To calculate the time a battery will last, take the capacity of the battery, then divide by the average current drawn.
For example: A monitoring application has the LCD on all the time, and is wired to a 1400mAH battery pack. Sitting in the half-press mode for almost all the time, this means the battery will last roughly 1400mAH/450mA = 3.1 hours. The same camera attached to a 12V SLA with 40AH capacity will last for roughly 40/.45 = 88.8 hours or 3.7 days. (Note that this ignores losses in the battery discharge and gains from voltage conversions.)