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    Batteries in my Canon 5D Mark IV are dramatically draining when camera is turned off
    #1
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    Hello,

    I've had my Canon 5D Mark IV for about 3.5 years. Recently, the batteries I've left inside the camera have started to dramatically drain, even when the camera is turned off.
    Aside from removing the batteries entirely when not shooting with it, is this something Canon can resolve or repair? Has anybody else had this problem?

    This has only just started happening.

    I should mention the only thing differently I've done with my Canon is I recently powered it using a V-Mount battery. I did it with a LPE6 Battery dummy pack and a D-Tap cable.
    Is it possible this could have caused some problem inside the Canon?

    The problem started happening after this, but it could just be coincidence.


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    #2
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    I think it's more likely that your batteries are starting to lose capacity after 3.5 years of use.


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    #3
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    That's a peculiar coincidence...which adapter model(s)?

    Nevertheless after 3.5 years your batteries (if used that long) would have diminished capacity (as mentioned ^), but I don't know if they would drain all the way down to zero unless you didn't use the camera for weeks in which the one inside the camera with reduced health might since that battery would drain incrementally even with the power off.


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    #4
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    True, 2 of my batteries are at 1/3 recharge capacity, but I tested out a brand new canon battery I purchased last month and it too drained from 100% to 0% over the course of 8 hours of the camera being turned off.

    The adapter, d-tap and v-mount battery I used are the following:

    V-Mount: Neewer V Mount/V Lock Battery - 95Wh 14.8V 6600mAh
    https://www.amazon.ca/Neewer-Mount-L...124695&sr=8-13

    Dummy Battery:
    https://edelkrone.com/products/lp-e6...action=buy-now

    D-Tap: Rotolight D-Tap Battery Cable for NEO LED Light
    https://www.bhphotovideo.com/c/produ...e_v_mount.html


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    In that case, some internals may be malfunctioning as that's not how it should be (especially over the course of 8 hours).

    I wanted to see if there was any kind of regulation from your power accessories and there seems to be in the battery but not the cables (if it matters at all).

    I've used these kind of 3rd party solutions before, but it's always D-tap straight to the dummy (LP-E6, FW50).


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    Quote Originally Posted by Budgieboots View Post
    I tested out a brand new canon battery I purchased last month and it too drained from 100% to 0% over the course of 8 hours of the camera being turned off.
    Just to clarify, did you purchased the battery from a reputable dealer? There are a lot of clones on Amazon, so you're better off getting them from Adorama or B&H.


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    #7
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    The new canon battery I purchased came from B&H. Its a Canon Branded battery.

    The Neewer V-Mount battery came from Amazon.ca

    The Dummy Battery pack I ordered from edelkrone, is actually this brand.

    http://lanparte.com/Product/info_45_itemid_355.html

    I notice under the FAQ it states:

    "Q. What’s the input voltage for the dummy battery?
    A. The input voltage is from 7.4V-8.4V. Please don’t have the input higher than 8.4V because the dummy battery can’t reduct voltage. Or it may damage your camera"

    I'm not sure if this led to the problem? I don't know how to calculate the output voltage from the Neewer battery.

    This is what Neewer states on their website.
    https://neewer.com/products/led-panel-lights-10095778


    SPECIFICATIONS
    Power: 95 W
    Charging Voltage: 16.8 V
    Nominal Voltage: 14.8 V
    USB Output: 5 V 2.1 A
    Rated Capacity: 6600mAh
    Standard Charging: 0.3C (1950mAh)/5 H
    Charging Temperature: 0℃~45℃
    Discharge Temperature: -20℃~50℃
    Battery Weight: 580 g
    Dimension: 150*95*37.8mm
    Material of Battery Case: ABS Plastic
    Last edited by Budgieboots; 09-14-2020 at 06:13 PM.


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    #8
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    That's what I meant above about regulation...

    For example, this adapter below (I know it's for Sony but it's a personal example of one I used the most) has the little regulation box built-in.

    Your cables appear to be just passing through whatever the battery is outputting.

    https://www.bhphotovideo.com/c/produ...oise_free.html


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    #9
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    This is what I use.

    https://www.coreswx.com/store.coreswx/product/ptc-lpe6/

    Powertaps/D-taps are usually ~14V / 10 amps.

    If you ran an unregulated power source, it may be possible that you damaged the camera, but I don't know enough about it to say whether or not the camera would keep working if damaged or if it really did suffer damage it would just completely stop working.


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