|
The batteries are chipped and you can only use a third party one that also has a chip, these are available, but although they will tell the camera they are charged they do not have the full functionality of the Canon units.
If you buy a battery grip the camera does some clever battery management between the two to maximise the number of shots and discharges the batteries in the best way for them. If you try to mix two batteries the system is unable to do this and you can end up with one discharging before the other, which is not how it's supposed to work.
I have to say I am a little puzzled as to why someone would spend over £1200 plus a lens (close to £2000) and then think it's reasonable to save a skinny £20 on the very thing that powers it all ! The original Canon unit is available for £50 when it's added into the whole cost it's a very tiny amount, and it gives a lot of addition features the third party ones don't.
|