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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 09 May 2010 (Sunday) 11:08
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Canon 7D - "cannot communicate with battery" error

 
eamo
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Nov 27, 2011 06:32 as a reply to  @ post 13455291 |  #31

The irony of it all is though that about two days before I was due to finish my holiday the batteries and camera all suddenly started communicating properly with each other again without me having done anything to affect it....

Weird!!!![/QUOTE]

problem i had was intermittant for a good while - reseat the batteries a few times and the camera would eventually recognise it. i'd say your camera is due a trip back to canon especially if its still under warrenty :(

eamon




  
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StarTzar
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Nov 27, 2011 07:25 |  #32

doofuss wrote in post #13455791 (external link)
exactly what I have been telling my wife!!!

Mine said: "Sure go ahead".
She's thinking that there is a correlation between camera numbers and price.
So the 1D must be a lot less expensive than the 7D........:D




  
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StarTzar
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Nov 27, 2011 08:32 |  #33

Keyan wrote in post #13309144 (external link)
You could also try pulling the backup battery and then using a cotton swab with just a drop or two of isopropyl (rubbing) alcohol on it and cleaning the contacts where the main battery interfaces with the camera.

I was having intermittent communications problems with batteries.....
I followed these instructions and it worked fine with my 7D.




  
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Broadway53
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Jul 14, 2012 16:01 |  #34

This problem just started with my 7D. I have two Canon batteries and it's the same on both. I've read several forums with solutions from send it to Canon for repair ($205) to freezing the camera for 6 minutes and then placing a warm battery in the camera (not going to even try that one). I have happened on the solution...at least for now. It's simply a contact problem between the battery and the camera. I install a battery and before I turn it on I "wiggle" the battery inside the battery compartment. There's not a lot of "wiggle room" and sometimes I have to wiggle north/south and sometime east/west but it seems to always work and I have my 7D back with the ability to read the battery strength and no worries about it draining after one day of sitting. If it gets worse I'll send it in and have the two contacts in the camera replaced but for now I'll use this work around.


Canon 6D, Canon 7D, Canon G1x, Canon 24-70 II, Canon 70-300, Canon 100L Macro, Canon 16-35 F4L

  
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Big ­ Bull
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Jul 14, 2012 18:52 as a reply to  @ Broadway53's post |  #35

I just got my 7D back from Canon Canada after having the same problem. Although, I was never able do do the wiggle thing to get it to work. Invoice says they re-soldered poor connection and cleaned CMOS. Total bill was $195.00, and I had the camera back in 7 days. Purolator had the camera for 6 of those days!




  
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warrior6901
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Jul 26, 2012 18:42 as a reply to  @ Big Bull's post |  #36

Must be something to the resoldering thing....and the wiggle room. I wiggled mine around after getting message on multiple canon batteries and now shows charge of the battery. Just a pain.


"The bitterness of poor quality is remembered long after the sweetness of low price is forgotten."

  
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MikeG2012
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Sep 04, 2012 19:08 |  #37

So this curse just hit me. Camera has been working great, slap on a brand new lens and now it won't register the OEM batteries. I've never put 3rd party batteries in it.

Is sending the camera in to Canon the only way to truly get it fixed?

Mike


Mike Glatzer Photography (external link)
5D3 | EF 70-200 f/2.8 L IS II | EF 100-400 f/4.5-5.6 L IS | EF 24-105 f/4 L IS | EF 16-35 f/2.8 L | Ʃ 35 f/1.4 | EF 50 f/1.2 L | EF 85 f/1.8

  
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doofuss
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Sep 05, 2012 01:31 |  #38

MikeG2012 wrote in post #14948284 (external link)
So this curse just hit me. Camera has been working great, slap on a brand new lens and now it won't register the OEM batteries. I've never put 3rd party batteries in it.

Is sending the camera in to Canon the only way to truly get it fixed?

Mike


I tried every fix mentioned on here when it happened to me and none of them worked at all. Then lo and behold, it goes back to normal and starts working correctly all by itself some several months later.


Canon 1dx & 7d gripped, Canon EF 100-400mm f/4.5-5.6 L, Sigma 120-300 f2.8 (sports), Sigma 70-200mm f2.8, Sigma 24-70 f2.8, Canon EFS 17-55mm f2.8, , Canon EF 50mm f/1.8, Sigma 8-16mm f4.5 - 5.6, Sigma 2 x teleconverter, Canon 600EX-RT Speedlight.

  
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apersson850
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Sep 05, 2012 02:07 as a reply to  @ doofuss's post |  #39

Has happened on one or two occasions for me, but that's it. Fixed itself.


Anders

  
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eamo
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Sep 05, 2012 04:28 |  #40

for me the problem started intermittantly, and gradually got worse over time until it wouldn't recognise the batteries regardless of what i done. I also started getting intermittent errors (can't remember which one); trip to canon sorted everything.




  
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ions
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Mar 16, 2013 15:15 |  #41

My 7D started doing this several weeks ago with the two LP-E6 I've had since I got the camera four years ago. I assumed the batteries were going so I bought another two LP-E6s. Same error with one of the new batteries - I'm not opening the other to test as they both have to go back because it appears it's the camera, not the batteries. I tried removing the internal battery for a reset and the error remains. I've also tried wiggling and the error remains. I have not tried isopropyl alcohol yet.


Gear: Canon EOS 5D3 | Canon EOS 7D | Canon 24-70L ƒ2.8 | Canon 100L ƒ2.8 | Canon 70-200 ƒ2.8L IS II | Canon 420 EX | Tamrac Evolution 9 | Crumpler 8 MDH | Manfrotto 190QC with 804RC2 head.
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MikeG2012
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Mar 16, 2013 17:05 |  #42

Final solution - send it to Canon. Nothing else worked for me. Its a relatively cheap fix.


Mike Glatzer Photography (external link)
5D3 | EF 70-200 f/2.8 L IS II | EF 100-400 f/4.5-5.6 L IS | EF 24-105 f/4 L IS | EF 16-35 f/2.8 L | Ʃ 35 f/1.4 | EF 50 f/1.2 L | EF 85 f/1.8

  
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h14nha
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Mar 17, 2013 05:14 |  #43

Mine started doing this last August. The battery life [with the battery left in the camera] was 24hours most. I got around it by removing the battery whenever I wasn't shooting. Last week, the error code disappeared, the battery life returned and it now works 100%.
I've read this has happened to others too, obviously a 7d problem..........


Ian
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My Gear - 7d, / 16-35mm F4 / 70-200 2.8 II / 100-400 / 300mm 2.8 / :D Fuji X Pro1 / XT-1 Graphite 18/35/56

  
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Big ­ Bull
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Mar 18, 2013 14:54 |  #44

ions wrote in post #15721913 (external link)
My 7D started doing this several weeks ago with the two LP-E6 I've had since I got the camera four years ago. I assumed the batteries were going so I bought another two LP-E6s. Same error with one of the new batteries - I'm not opening the other to test as they both have to go back because it appears it's the camera, not the batteries. I tried removing the internal battery for a reset and the error remains. I've also tried wiggling and the error remains. I have not tried isopropyl alcohol yet.

Since their service centre is in Mississaugua, I'd just send it there. I had the same problem, and they had it fixed and back to me in a week. Expect to pay around $200, unless it is still under warranty.




  
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AirTahoe
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Jul 16, 2013 13:09 |  #45

10 minutes in the freezer with a zip lock bag fixed it for me. I'm serious.

It is a very common issue according to the Canon person on the phone. Many calls a week about this one and cost $235 to repair at Irvine service center.




  
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Canon 7D - "cannot communicate with battery" error
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