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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 22 Oct 2012 (Monday) 16:42
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7D problem

 
ttownvstrom
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Location: Tulsa Oklahoma
     
Oct 22, 2012 16:42 |  #1

A few weeks ago my battery was dead and when I charged it up my camera said can't communicate with battery, so I bought a new one and it worked flawlessly till this weekend and the same thing happened, dead and no communication. I charged up both batteries and spent the day taking photos and everything good till I pressed the shutter and nothing. I checked and the camera said it can't communicate with my lens. I shut the camera off and turned it on and no problems except it still won't talk to the battery. I cleaned all the contacts, does this sound like something is shorting out or what. It seems like there is a drain on the battery, after full charge and sitting in the camera overnight and only 19 photos the battery was down 25 percent. Any Ideas. Terry.


Canon 7D2, Canon 100-400mmV2, Tamron 60mm macro, Tamron 10-24mm and Canon 400mm 5.6

  
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Rich ­ Smith
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Oct 22, 2012 16:45 |  #2

Think I just read of this problem..have you done the new firmware update and then it started happening?




  
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amfoto1
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Oct 22, 2012 16:54 |  #3

And, are they Canon OEM batteries, or third party?


Alan Myers (external link) "Walk softly and carry a big lens."
5DII, 7DII(x2), 7D(x2) & other cameras. 10-22mm, Tokina 12-24/4, 20/2.8, TS 24/3.5L, 24-70/2.8L, 28/1.8, 28-135 IS (x2), TS 45/2.8, 50/1.4, Tamron 60/2.0, 70-200/4L IS, 70-200/2.8 IS, 85/1.8, Tamron 90/2.5 Macro, 100/2.8 USM, 100-400L II, 135/2L, 180/3.5L, 300/4L IS (x2), 300/2.8L IS, 500/4L IS, EF 1.4X II, EF 2X II. Flashes, studio strobes & various access. - FLICKR (external link) - ZENFOLIO (external link)

  
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Wallace ­ River
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Oct 22, 2012 16:55 as a reply to  @ Rich Smith's post |  #4

My 7D started showing the same symptoms (cannot communicate with battery, plus battery going dead overnight) a week or two ago. I finally took out the battery and cleaned the contacts inside the battery compartment (I used the eraser end on a pencil) and shoved the battery in quite hard two or three times, and it seems OK now, it does communicate and it retains its charge properly.

There's an earlier thread here about this and things you can try. https://photography-on-the.net/forum/showthre​ad.php?t=870455


IAN - Living life on the shores of the Wallace River in northern Nova Scotia, Canada :
Canon 1D4, 1D-X, almost enough glass.
My Flickr (external link). http://ianmurray.zenfo​lio.com/ (external link)

  
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amfoto1
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Oct 22, 2012 17:52 |  #5

Yeah, cleaning the contacts might help.

But I don't recommend using a pencil eraser. The reason being that a lot of the time it's oils (from fingers or whatever) on the contacts that are causing the problem, and pencil erasers are made from vegetable oils, so might not be much help.

Instead I'd suggest using a clean rag and some isopropyl alcohol (standard rubbing alcohol is fine). Many of the contacts in the cameras are gold plated (tho I really don't know if this is true of the battery contacts).... Because gold doesn't oxidize. Using anything abrassve risks scratching the plating and possible problems with oxidization in the future. Shouldn't need anything abrassive, anyway.


Alan Myers (external link) "Walk softly and carry a big lens."
5DII, 7DII(x2), 7D(x2) & other cameras. 10-22mm, Tokina 12-24/4, 20/2.8, TS 24/3.5L, 24-70/2.8L, 28/1.8, 28-135 IS (x2), TS 45/2.8, 50/1.4, Tamron 60/2.0, 70-200/4L IS, 70-200/2.8 IS, 85/1.8, Tamron 90/2.5 Macro, 100/2.8 USM, 100-400L II, 135/2L, 180/3.5L, 300/4L IS (x2), 300/2.8L IS, 500/4L IS, EF 1.4X II, EF 2X II. Flashes, studio strobes & various access. - FLICKR (external link) - ZENFOLIO (external link)

  
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ttownvstrom
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Oct 22, 2012 18:42 as a reply to  @ amfoto1's post |  #6

No firmware update, Canon batteries, and I cleaned the contacts with alcohol. I don't get the can't communicate with the lens, but I cleaned the contacts for the lens also.


Canon 7D2, Canon 100-400mmV2, Tamron 60mm macro, Tamron 10-24mm and Canon 400mm 5.6

  
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ttownvstrom
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Oct 22, 2012 18:53 as a reply to  @ ttownvstrom's post |  #7

Wow, Wallace River thanks for the link. I had no idea there was a problem like that. I've had my camera for almost 2 years and no problems.


Canon 7D2, Canon 100-400mmV2, Tamron 60mm macro, Tamron 10-24mm and Canon 400mm 5.6

  
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Wallace ­ River
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Oct 22, 2012 20:03 |  #8

ttownvstrom wrote in post #15156099 (external link)
Wow, Wallace River thanks for the link. I had no idea there was a problem like that. I've had my camera for almost 2 years and no problems.

No problem, and same here until last week ;)


IAN - Living life on the shores of the Wallace River in northern Nova Scotia, Canada :
Canon 1D4, 1D-X, almost enough glass.
My Flickr (external link). http://ianmurray.zenfo​lio.com/ (external link)

  
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kfreels
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Oct 22, 2012 20:17 |  #9

Fully discharging lithium-ion batteries can completely kill them. They don't have "memory" so it's a good practice to change or charge batteries before they are completely dead.


I am serious....and don't call me Shirley.
Canon 7D and a bunch of other stuff

  
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DennisW1
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Oct 22, 2012 22:07 |  #10

kfreels wrote in post #15156419 (external link)
Fully discharging lithium-ion batteries can completely kill them. They don't have "memory" so it's a good practice to change or charge batteries before they are completely dead.

Unless you devise your own custom rig, you'll never completely discharge your camera battery. The camera's voltage regulator simply cuts off at a certain low voltage point, and even chargers that "condition" batteries (The Canon 7D charger does not) will not completely discharge a battery below it's safe point.

And even if you did make such discharge device, you would have to do it many times before you would completely kill a Li-Ion battery.




  
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kfreels
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Oct 23, 2012 01:03 |  #11

DennisW1 wrote in post #15156829 (external link)
Unless you devise your own custom rig, you'll never completely discharge your camera battery. The camera's voltage regulator simply cuts off at a certain low voltage point, and even chargers that "condition" batteries (The Canon 7D charger does not) will not completely discharge a battery below it's safe point.

And even if you did make such discharge device, you would have to do it many times before you would completely kill a Li-Ion battery.

Well, my daughter has done it numerous times on her cell phone battery but it's good to know that the camera protects the batteries from this.


I am serious....and don't call me Shirley.
Canon 7D and a bunch of other stuff

  
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7D problem
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