5D Mark III Firmware Update 1.2.1 Battery Fault

Hi, after I upgraded my 5D mkiii to 1.2.1 my camera does not recognise my batteries which are original canon batteries. I even bought new ones just to be sure. I am certain it happened straight after the update and can find no cure at the moment except canon asking me to return the camera to them for repair. I know the update is supposed to do this for 3rd party batteries but not original canon batteries.. Has anyone come across this ? Cheers....
 

R1-7D

EOS 7D MK II
Jun 25, 2012
726
62
Canada
It is a known problem. I have three genuine Canon batteries and my 5D3 only recognizes one as authentic.
 

fugu82

EOS RP
Mar 3, 2012
200
0
Bummer. Hope Canon makes it right.
My 5D3 running 1.2.1 even recognizes the Wasabi batteries I stuff into it.
 
Yes , the camera still works but I get the "batteries not recognised " and press ok.. The batteries are not seen and indicates low battery all the time. Annoying really so I carry spare batteries just in case as I can't see battery levels. I do a lot of field work and it is just another thing to worry about on location. Here's hoping canon will recognise the problem or admit there is a problem. If they did at least I would know they are working on it. Just wanted to advise not to upgrade if you haven't already and wait for the next one.. :) Hope a fix comes soon..
 

Mt Spokane Photography

I post too Much on Here!!
Mar 25, 2011
15,940
1,056
Carnage said:
Yes , the camera still works but I get the "batteries not recognised " and press ok.. The batteries are not seen and indicates low battery all the time. Annoying really so I carry spare batteries just in case as I can't see battery levels. I do a lot of field work and it is just another thing to worry about on location. Here's hoping canon will recognise the problem or admit there is a problem. If they did at least I would know they are working on it. Just wanted to advise not to upgrade if you haven't already and wait for the next one.. :) Hope a fix comes soon..
The fix is to send in your defective camera. This is not a normal occurrence, I've had two 5D MK III's and no issues like that. Canon did apparently update some of their batteries about the first of the year.

Don't expect a firmware fix, it will likely never come.
 

cliffwang

EOS 7D MK II
Feb 7, 2012
501
0
49
Morgan Hill, CA
I guess firmware 1.2.1 might do checksum based on both camera information and battery information. Unfortunately the new algorithm has a flaw, so it doesn't work well with your camera. It shouldn't affect any function of this camera. I think Canon should fix the problem in the next firmware. You should report the issue to Canon.
 

iaind

EOS RP
Jul 25, 2011
353
0
63
I have some Canon batteries that 5d2 recognises but 5d3 does not after upgrade.
 

sama

EOS RP
Feb 23, 2012
257
1
It's likely that there are too many counterfeits out there.

Genuine and decoded third party batteries are fine on my 5DIII.