Battery's go dead 20D

I pulled my 20D out of my bag yesterday to get some photo's of my Grand Daughter and I found that both batteries in my grip were completely dead!!! The camera was no on? I am not sure what is going on but I was hoping one one you may give me an answer. Could it be my battery grip? Is the camera on the fritz??

Thanks in advance

Art Schlaman

Canon 20D, 35mm f 1.4L, 50mm F1.4. 85mm F1.8,85mm f1.2L, 135mm f2.0L 18-85mm IS, 17-40MM f4L, 135mm soft focus
300mm IS F4L, 70-200MM f2.8L IS, 100-400mm IS L, 75-300mm IS,
Tamron 28mm-75mm f 2.8, Tamron 180mm f2.8 macro, 580 EX flash, EOS3
Canon G6, EOS3
Hasselblad Xpan w/ 30mm and 45mm
Contax Aria, 21mm, 25mm, 28mm, 35mm, 50mm, 85mm
Fuji GA645i, GA670III
Epson RD-1 with Zeiss ZM 35mm f 2 and lots of Leica's
Epson P2000 storage device

Hmm..seems strange, did you set the autopower off to an 'off' value, then forgot to turn the camera off?
Its seems very strange this has happened. maybe the batteries are rubbish copies, or they were just dead, as they sometimes go!
Sometimes the answer is in the question!
let us know
K

Mine 20d as well. I was during photo session and 20d + grip ate my one battery then second . .
I put off grip and put in the 3 rd battery dirrectly to the body and then I took about 600 pic and it was OK. Today fully charged batteries l put into the grip and it locked my 20 d

You know what?
After going thru 3 grips to fix the flex issue with the BG-E2, I have kept my 4th grip which is of the newer "fixed" serial numbers. However, I still have the flex issue, and decided to deal with it myself.
However, since I've had the grip, I swear my batteries drain twice as quickly, much like Art initally posted. It seems that just having the batteries in the grip drains battteries, something that never happened with the camera alone. I also seem to get alot few shots with the grip, but that is something I will have to double check. If that is the case, this grip is going back to Canon for the 5th time.