Comments on: Does the Canon EOS-40D DSLR camera allow charging the battery via USB? i.e. no need to remove the battery?

By: Yosemite Sam

Yosemite Sam — Mon, 27 Oct 2008 15:49:59 +0000

Yup, by the time you're on to such a piece of kit you really should be using a card reader for uploading...
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By: fhotoace

fhotoace — Mon, 27 Oct 2008 15:39:59 +0000

You just need a card reader for your CF card … that is what most users of DSLR's have been using for years.

And no, the battery charger that came with your Canon produces much more than just the power necessary to charge your battery in s few hours .. it also prevents overcharging … some even condition the Li-ion batteries. The USB data port on your computer only provides unregulated 5v power suitable for some devices that draw very low amps (under 500 mA … most battery chargers produce charging voltages at nearly one amp). Perhaps most importantly, there is no connection between the USB port on your camera and its battery.
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proFotog

By: David M

David M — Mon, 27 Oct 2008 15:15:59 +0000

No, it will not. Most if not all cameras will not charge via the USB port. It would be nice but they don't work that way.
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