New Battery Grip for EOS 5D Mark IV & More [CR2]

[Takingshots]

So much speculation. Canon - don't wait till photokina to launch ... Do it now.

 

[rrcphoto]

That makes no sense from a technical standpoint. Batteries in a grip are used alternately, not simultaneously.

Hate to burst your bubble, but my 7D Mark II uses both bateries simultaneously. Original grip, original bateries.

It's not like 1 battery drains to 0% and then the second one kicks in. Both lose power about equally.

I concur with most of that but the drain is not equal. I have some thoughts that the batteries are shared between camera functions. One used by the camera and the other used by the lens. I have no evidence of that other than the dissimilar drain rates.

That being said it might be possible that Canon is doing some trickery like switching batteries between sleep and wake up to drain them more evenly. But again it's only speculation. For certain though one doesnt go to zero before the 2nd battery kicks in.

no one seems to understand basic parallel power source operations where.

if you put two power sources in parallel, the one with the higher voltage will absorb the most current.

just because they are 7.2V doesn't mean they are exactly 7.2V, so there will be unequal voltage draws until one discharges enough to be the "lower voltage" battery.

 

[Jack Douglas]

That makes no sense from a technical standpoint. Batteries in a grip are used alternately, not simultaneously.

Hate to burst your bubble, but my 7D Mark II uses both bateries simultaneously. Original grip, original bateries.

It's not like 1 battery drains to 0% and then the second one kicks in. Both lose power about equally.

I concur with most of that but the drain is not equal. I have some thoughts that the batteries are shared between camera functions. One used by the camera and the other used by the lens. I have no evidence of that other than the dissimilar drain rates.

That being said it might be possible that Canon is doing some trickery like switching batteries between sleep and wake up to drain them more evenly. But again it's only speculation. For certain though one doesnt go to zero before the 2nd battery kicks in.

no one seems to understand basic parallel power source operations where.

if you put two power sources in parallel, the one with the higher voltage will absorb the most current.

just because they are 7.2V doesn't mean they are exactly 7.2V, so there will be unequal voltage draws until one discharges enough to be the "lower voltage" battery.

Not to take issue here but perhaps clarification is in order. Assuming ideal conductivity the interconnection has no resistance so by definition anything in parallel has exactly the same voltage. However, batteries have internal resistance and so paralleling two batteries causes the higher to charge the lower until the voltage equalizes as suggested. Except for a little power wasted by the equalization current flowing through the internal resistance you haven't lost much and the voltage should be between the lower and the higher. It's fine for automotive batteries. The principle is the same as a charger charging a depleted battery until the voltage of the battery reaches that of the charger and then charge current essentially ceases (trickle).

Since I don't know Canon's configuration I can't be certain but I suspect that they would not want batteries that are at different states of charge (voltage) being randomly placed in a wired parallel configuration as rrcphoto suggests since a fresh battery could be charging a depleted one. No doubt some smart transistor switching circuitry is used.

Jack

 

[Mitch.Conner]

...We’re also told that the EOS 5D Mark IV will see the return of the red autofocus point in AI servo mode...

Well that will be a welcome return. But why only in AI servo mode?

-pw

Perhaps a typo. Strange the AF would be red only in 1 mode.

Like to see the option of using 1Dx series batteries in the grip.

or storage.. have a 1TB raided array in a grip.

or coffee.. have a mini K-cup brewer in a grip.

So many possibilities!

[CR3] Canon 5D Mark IV To have mini K-Cup brewer in newly designed battery grip.

If anybody has a problem with the source, it's Neuro's fault.

 

[rrcphoto]

That makes no sense from a technical standpoint. Batteries in a grip are used alternately, not simultaneously.

Hate to burst your bubble, but my 7D Mark II uses both bateries simultaneously. Original grip, original bateries.

It's not like 1 battery drains to 0% and then the second one kicks in. Both lose power about equally.

I concur with most of that but the drain is not equal. I have some thoughts that the batteries are shared between camera functions. One used by the camera and the other used by the lens. I have no evidence of that other than the dissimilar drain rates.

That being said it might be possible that Canon is doing some trickery like switching batteries between sleep and wake up to drain them more evenly. But again it's only speculation. For certain though one doesnt go to zero before the 2nd battery kicks in.

no one seems to understand basic parallel power source operations where.

if you put two power sources in parallel, the one with the higher voltage will absorb the most current.

just because they are 7.2V doesn't mean they are exactly 7.2V, so there will be unequal voltage draws until one discharges enough to be the "lower voltage" battery.

Not to take issue here but perhaps clarification is in order. Assuming ideal conductivity the interconnection has no resistance so by definition anything in parallel has exactly the same voltage. However, batteries have internal resistance and so paralleling two batteries causes the higher to charge the lower until the voltage equalizes as suggested. Except for a little power wasted by the equalization current flowing through the internal resistance you haven't lost much and the voltage should be between the lower and the higher. It's fine for automotive batteries. The principle is the same as a charger charging a depleted battery until the voltage of the battery reaches that of the charger and then charge current essentially ceases (trickle).

Since I don't know Canon's configuration I can't be certain but I suspect that they would not want batteries that are at different states of charge (voltage) being randomly placed in a wired parallel configuration as rrcphoto suggests since a fresh battery could be charging a depleted one. No doubt some smart transistor switching circuitry is used.

Jack

why would you need to? a simple diode will prevent that.

 

[Jack Douglas]

I guess it depends on whether simple isolation is desired or some form of optimization relative to making best use of the separate battery power. I'm not at all familiar with camera electronics.

Jack

 

[cenkog]

Built-in Wi-Fi, GPS & a "Radio Flash Commander" please...

Inside the grip? That would be the most useful grip ever build.

No, in-body... An "in-body radio flash commander" is of extreme importance for wedding photographers... Make it Canon, please...

 

[Memdroid]

Built-in Wi-Fi, GPS & a "Radio Flash Commander" please...

Inside the grip? That would be the most useful grip ever build.

No, in-body... An "in-body radio flash commander" is of extreme importance for wedding photographers... Make it Canon, please...

A full Faraday caged body will not transmit these signals reliably. I think it makes more sense to accommodate those things in a grip.