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Thread started 22 Jul 2017 (Saturday) 19:21
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7D2 How low does your battery have to get before performance starts acting up?

 
GAJoe
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North Georgia, USA
Jul 22, 2017 19:21 |  #1

I usually don't take enough images in an outing to drain my battery 50%. But a couple times that I have I would realize that it was low because my shutter would hold up like my 60D when the buffer had filled. I would start looking for a problem and see that the battery was at 50%. Pop in my second battery and all would be back to normal. Is this typical behavior? It is a refurb' but this is the only problem I have encountered with it IF it is abnormal.


Canon 7D Mk II, EF 100-400L MkII, EF 1.4X III, EF-S 18-135mm STM, 430 EX II flash, DCR-150, DCR-250, MANFROTTO 055XPROB w/ 322RC Grip

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mwsilver
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Post has been edited 4 months ago by mwsilver.
Jul 22, 2017 20:22 |  #2

GAJoe wrote in post #18408788 (external link)
I usually don't take enough images in an outing to drain my battery 50%. But a couple times that I have I would realize that it was low because my shutter would hold up like my 60D when the buffer had filled. I would start looking for a problem and see that the battery was at 50%. Pop in my second battery and all would be back to normal. Is this typical behavior? It is a refurb' but this is the only problem I have encountered with it IF it is abnormal.

Frankly on my 7D Mark II I've never noticed a difference in performance as the battery charge wears down. I can't say for certain that what you're referring to doesn't happen, but, I've never seen it after two plus years and many tens of thousands of images with my current camera.


Mark
Canon 7D II, 60D, T3i, T2i, Sigma 18-35 f/1.8, and 30 f/1.4. Canon EF 70-200 L f/4 IS, EF 35 f/2 IS, EFs 10-18 STM, EFs 15-85, EFs 18-200, EF 50 f/1.8 STM. Tamron 18-270 PZD, B+W MRC CPL, Canon 320EX, Vanguard Alta Pro 254CT & SBH 250 head. RODE Stereo Videomic Pro, Lightroom 6, Elements 15

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TreeburnerCT
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Stratford, CT, USA
Jul 22, 2017 20:27 |  #3

I don't usually wear my batteries down that much without charging them, but I have drained them completely and didn't see any decline in performance as a result. Probably time for some new batteries if you're getting that much voltage drop.

-Joe


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Naturalist
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Tallgrass prairies of northwest Minnesota
Jul 22, 2017 22:30 |  #4

I've not experienced this as my batteries have never fallen below 25% charge so the performance has not been compromised.


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Capn ­ Jack
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Jul 23, 2017 02:11 |  #5

I've taken my battery down to where the camera tells me is is low, I think that is 10%, with no problems. Original battery, about 2 years old. Over 10,000 clicks.


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russbecker
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Eastern PA, USA
Jul 23, 2017 04:39 |  #6

I typically take my 7D2 batteries down to less than 10 per cent with no change in performance. One one occasion, at an air show, I shot it out (1800 shutter snaps).


7D2 | 7D | 40D | 300 f/4 L | 70-200 f/2.8 IIL | 70-200 f/4L | 135 f/2 L | 85 f/1.8 | 100 f/2 | 60 f/2.8 macro | nifty-fifty | 10-22 f/3.5-4.5 | Tamron 150-600 | Tamron 17-50 f/2.8 | Sigma 30 f/1.4 | Sigma 50-150 f/2.8 | Sigma 120-400

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saea501
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Jul 23, 2017 07:08 |  #7

I don't have a 7D 2 but I have had three Canons, 500D, 600D and now a 6D. I use the camera until the battery level indicator starts flashing on all of them and I've never experienced any performance issues.

I would suggest to you that what you are experiencing is not at all normal. The camera works as designed whether the battery is fully charged or it has been drained to the point that it needs to be recharged.

I would bet that if you were to call Canon they would tell you the same thing.


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greenjeans
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Greenville, SC
Jul 23, 2017 12:55 |  #8

Three Canons and they all just go at the same speed until the battery totally quits. Never saw a slowdown based on battery charge.


Gripped 6D, gripped 70D, gripped T3i, 24-105 F4L, 50mm 1.8 STM, 55-250mm, 18-135mm, 60mm EF-S macro, 70-200 F4L IS, 400mm F5.6L, 18-55mm IS STM, Canon 85mm 1.8, Sigma 150-600mm C., Sigma 100-400mm C, Samyang 8mm 3.5 fisheye

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GAJoe
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North Georgia, USA
Jul 23, 2017 15:24 |  #9

Thanks for all the replies. I will mark one battery to determine if it's a battery or body issue.


Canon 7D Mk II, EF 100-400L MkII, EF 1.4X III, EF-S 18-135mm STM, 430 EX II flash, DCR-150, DCR-250, MANFROTTO 055XPROB w/ 322RC Grip

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John ­ from ­ PA
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Post has been edited 4 months ago by John from PA.
Jul 23, 2017 15:50 |  #10

GAJoe wrote in post #18409364 (external link)
I will mark one battery to determine if it's a battery or body issue.

Also, consider disabling the power hungry GPS and test the behavior.

If you haven't done so, update the firmware (see https://www.usa.canon.​com ...subtab=downloads-firmware (external link)). There isn't anything specific about battery life, but some wording might be interpreted to mean slow response. The current version is 1.1.2 and came out the end of June 2017.




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GAJoe
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North Georgia, USA
Jul 23, 2017 18:48 |  #11

I've always had the GPS disabled.
I do need to do the firmware update though.

Thanks


Canon 7D Mk II, EF 100-400L MkII, EF 1.4X III, EF-S 18-135mm STM, 430 EX II flash, DCR-150, DCR-250, MANFROTTO 055XPROB w/ 322RC Grip

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Tapeman
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Jul 24, 2017 10:40 |  #12

Battery life is affected by charging cycles. You can typically only charge a battery so many times. You will get more use if you drain the cell to a low level before charging.
My advice is to carry a spare and use the battery down to 10% or less.


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mwsilver
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Joined Oct 2011
Central New Jersey
Jul 24, 2017 11:21 |  #13

Tapeman wrote in post #18409832 (external link)
Battery life is affected by charging cycles. You can typically only charge a battery so many times. You will get more use if you drain the cell to a low level before charging.
My advice is to carry a spare and use the battery down to 10% or less.

I always have at least two spares with me, just in case one or both are not fully charged. That has happened once or twice.


Mark
Canon 7D II, 60D, T3i, T2i, Sigma 18-35 f/1.8, and 30 f/1.4. Canon EF 70-200 L f/4 IS, EF 35 f/2 IS, EFs 10-18 STM, EFs 15-85, EFs 18-200, EF 50 f/1.8 STM. Tamron 18-270 PZD, B+W MRC CPL, Canon 320EX, Vanguard Alta Pro 254CT & SBH 250 head. RODE Stereo Videomic Pro, Lightroom 6, Elements 15

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Lbsimon
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Boston, MA
Jul 24, 2017 18:29 |  #14

Tapeman wrote in post #18409832 (external link)
Battery life is affected by charging cycles. You can typically only charge a battery so many times. You will get more use if you drain the cell to a low level before charging.

Not sure if it is still true. It was so for Ni-Cad batteries, but not for modern Li-Ion technology, I think. Need to talk to our battery experts at work.


5D Mark IV | 6D | S110
EF 17-40L | EF 24-105L (two) | EF 70-200L F4 IS | EF 100-400L II | EF 85 1.8 | EF 50 1.8 STM | Canon 1.4x III | Canon 1.4x II
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davesrose
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Atlanta, GA
Jul 24, 2017 18:59 |  #15

debunking-battery-life-myths (external link)

five-tips-for-extending-lithium-ion-battery-life (external link)

It is generally recommended not to discharge a lithium-ion battery fully.

As for camera performance: I'm like other posters....never experienced a performance difference with lithium ion batteries going below 50% (with my cameras, phones, or laptops).


Canon 5D mk III , 7D mk II
EF 135mm 2.0L, EF 70-200mm 2.8L IS II, EF 24-70 2.8L II, EF 50mm 1.4, EF 100mm 2.8L Macro, EF 16-35mm 4L IS, Sigma 150-600mm C, 580EX, 600EX-RT, MeFoto Globetrotter tripod, grips, Black Rapid RS-7, CAMS plate and strap system, Lowepro Flipside 500 AW, and a few other things...
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