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

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Budgieboots

New member
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.
 
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.
 
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-...ild=1&keywords=v-mount&qid=1600124695&sr=8-13

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

D-Tap: Rotolight D-Tap Battery Cable for NEO LED Light
https://www.bhphotovideo.com/c/product/1415974-REG/rotolight_rl_d_tap_battery_cable_v_mount.html
 
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).
 
Budgieboots said:
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.
Click to expand...
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.
 
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:
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.
 
To update, yes it looks like something got damaged inside from the over-voltage. I had to send the camera to Canon for repair and the camera needed new parts related to the battery compartment.

It's back to functioning as normal now. I can turn the camera off and the batteries aren't draining as if it were turned on.
 
Update:

Nope, wasn't fixed. Batteries still depleting rapidly even when camera is turned off.
Had to send the body back to Canon using their 90 repair warranty.
 
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