Swapping Batteries in Battery Grip

Started by WaltMarsh, July 13, 2012, 02:13:45 PM

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WaltMarsh

While recording long events it would be great if there is a shortcut to disable one side of the battery grip, open the compartment door, replace battery, close compartment door, enable battery port, all while recording.

Is this possible?
Canon 5DMK2, 28mm+50mm+85mm Zeiss Primes, 28-75mm+75-200mm Tamron,Tascam DR-40, other stuff too :-)

Malcolm Debono

What kind of grip do you have? When I open mine, both batteries come out, so it definitely wouldn't be possible.
Wedding & event cinematographer
C100 & 6D shooter
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nanomad

Do you mind uploading a macro shot of the battery grip door?
EOS 1100D | EOS 650 (No, I didn't forget the D) | Ye Olde Canon EF Lenses ('87): 50 f/1.8 - 28 f/2.8 - 70-210 f/4 | EF-S 18-55 f/3.5-5.6 | Metz 36 AF-5

ilguercio

My BG is a clone but i guess every one of them is pretty much the same.
If i start the camera with the batteries inside but with the door open everything is fine.
Then, when you close the door, the switch triggers and you lose power for the amount of time the spring takes to come back into place.
This contact can probably be faked, i don't know, it would be a nice feature for hardcore movie users.
Canon EOS 6D, 60D, 50D.
Sigma 70-200 EX OS HSM, Sigma 70-200 Apo EX HSM, Samyang 14 2.8, Samyang 35 1.4, Samyang 85 1.4.
Proud supporter of Magic Lantern.

WaltMarsh

Canon 5DMK2, 28mm+50mm+85mm Zeiss Primes, 28-75mm+75-200mm Tamron,Tascam DR-40, other stuff too :-)

nanomad

Can you confirm that this works?:
- Start with the lid open and two batteries
- Power up camera
- Hotswap one battery
- Camera doesn't shutdown

If so, I'll have a look at the firmware to see if I can spot something
EOS 1100D | EOS 650 (No, I didn't forget the D) | Ye Olde Canon EF Lenses ('87): 50 f/1.8 - 28 f/2.8 - 70-210 f/4 | EF-S 18-55 f/3.5-5.6 | Metz 36 AF-5

ilguercio

Quote from: nanomad on July 13, 2012, 04:26:47 PM
Can you confirm that this works?:
- Start with the lid open and two batteries
- Power up camera
- Hotswap one battery
- Camera doesn't shutdown

If so, I'll have a look at the firmware to see if I can spot something
It wors for me with 50D and BG-E2 clone :)
I bet every BG works the same ;)
Canon EOS 6D, 60D, 50D.
Sigma 70-200 EX OS HSM, Sigma 70-200 Apo EX HSM, Samyang 14 2.8, Samyang 35 1.4, Samyang 85 1.4.
Proud supporter of Magic Lantern.

WaltMarsh

Quote from: nanomad on July 13, 2012, 04:26:47 PM
Can you confirm that this works?:
- Start with the lid open and two batteries
- Power up camera
- Hotswap one battery
- Camera doesn't shutdown

If so, I'll have a look at the firmware to see if I can spot something

Yes this works.
Canon 5DMK2, 28mm+50mm+85mm Zeiss Primes, 28-75mm+75-200mm Tamron,Tascam DR-40, other stuff too :-)

Malcolm Debono

Quote from: ilguercio on July 13, 2012, 04:36:33 PM
I bet every BG works the same ;)

Unfortunately it won't work with newer grips since now the compartment opens from the side, and you need to eject the tray containing both batteries to replace any one of them (see picture below).

Wedding & event cinematographer
C100 & 6D shooter
New here?  Check out the FAQs here!

ilguercio

Quote from: Malcolm Debono on July 13, 2012, 05:26:30 PM
Unfortunately it won't work with newer grips since now the compartment opens from the side, and you need to eject the tray containing both batteries to replace any one of them (see picture below).


That's for rebel only, am i correct?
Canon EOS 6D, 60D, 50D.
Sigma 70-200 EX OS HSM, Sigma 70-200 Apo EX HSM, Samyang 14 2.8, Samyang 35 1.4, Samyang 85 1.4.
Proud supporter of Magic Lantern.

KeeganBaird

Quote from: ilguercio on July 13, 2012, 06:52:00 PM
That's for rebel only, am i correct?

My Meike brand grip for my 60d slide out like this...

1%

Both of my grips slide out to the side. I don't think there is even anything besides +/- on the grip anyway.

Does the battery meter even work with most grips? I think on my 400D it seems to and its a tavor grip. On the 600D my meike grip reports full.. hardly ever 2 bars and then "change the battery pack."