Battery power???

[estrugo]

Hi, I was doing some test and I'm more confused now :confused:

I have a Rebel XT with grip, and a Powershot S2 IS (no grip jejeje)

I never used the AA cartridge for the grip of the XT, and wanted to try it, just to know if it works, and I did some tests:

1. I used 6 rechargeable batteries (2500 mAh) total 7.2 V; the camera showed the low battery icon
2. I used 4 rechargeables + 2 Alkalines, total 7.8 V; the camera still showed the low battery icon, why? when used with the factory rechargeable NB-2LH, the power is 7.4 V
3. I used 2 rechargeables + 4 Alkalines, total 8.4 V; the camera still showed the low battery icon, again, why?

Then I tried with the Canon rechargeables:
4. I used one NB-2LH and the camera showed full power icon
5. I used two NB-2LH and the camera showed full power icon

In the bottom of the camera (Rebel XT), it says 8.1V power, so I didn't try to use six alkaline AA's as it will be 9V and didn't know if be overcharged? that's maybe why this type of batteries are for emergency? (as says the manual of the grip), can it get damaged if use six AA's for too much time?

I'm totally confused, why the h*** the BG-E3 doesn't give full power to the camera when using AA's

In the bottom of the S2, it says 7.4V power, but using 4 NiMh, you have 4.8V and the camera runs perfectly fine, also better than using 4 alkaline that brings 6V, totally opossite to the XT :confused: , you never reach the camera "nominal" power requirement, and it runs perfect...

Can be the electric resistance of the type of connections? the AA cartridge for the XT grip, looks complicated to have all the batteries work togheter...

I think that I will stick with my NB-2LHs and have the AA's as recommended in the grip manual, just for emergencies

Any thoughts?

[Grace]

i just bought a grip and would love to know the thoughts on this too!

kp

[foty89]

I have read this kind of post before, and seen even more math on it. And to be perfectly honest, I have to believe that the low battery icon shows up because Canon has programed the camera that way. This way, you will be more likely to use their batteries. I don't have any proof of this other than that it should work fine with AA batteries, but everyone gets the low battery indicator.

[foty89]

As a follow up post, I am interested in this, as I plan to get the grip and a 430EX relatively shortly and was hoping to be able to use the Sanyo Eneloop batteries in them both to make things simple.

[Ephemeral]

What's the actual current accross your battery combinations?

Voltage is only the "pressure" the juice flows at, how wide is the flow?*




*I think I've managed to exhaust my electronic knowledge in one sentance...there's a V=I/R somewhere too. :P

[estrugo]

Sorry for the ignorance, but what you exactly mean with "flow"?