False Battery indicator flashes

Hi Guys,

I have two 5d bodies, both with the Battery Grips, each containing two batteries. I also have two more spare batteries, so that's 6 in total.

Now something really funny has started to happen, every now and again, I can see that the battery light will flash on the camera's top panel, indicating low battery. Originally, I used to change the batteries thinking it really was that. Charging the battreries then used to indicate that the batteries were fully charged. Ummmmm

Now when the battery indicator flashes, I open the battery grip door for a few seconds and then close again, now the display reads fully charged battery and can carry on shooting and then the indicator will flash again and so on. I can get about 600+ shots in total, but this false indicatort business is a pain. This can happen after anything from 10 shots to 100 from fully charged batteries. I have tried different batteries to rule out faulty batteries, but the most ironic things is that it does it on both cameras and both battery grips.

Any ideas please guys

Does it ever happen without the battery grips? My 20D's battery grip causes a similar problem to occasionally occur.. minor annoyance but doesn't actually affect how much use I get out of the batteries.

Actually, good point Jim.

If I'm honest, I haven't tried w/o the grip. I will do though. Bit of a pain though.

Faulty BG do you think

Do you use the grip to hold the camera, or do you support everything by the lens? I suspect Canon assumes you'll do the standard from time immemorial thing and support everything with your left hand under the body and lens, not hang onto the grip with the same hand you're going to delicately trip the shutter with. If you hang onto everything by the grip, it gets to flex beyond design specs, and breaks contact.

make sure the wheel is tight and the grip is making full and positive contact.

You might see something like this if one of the batteries isn't holding a charge. Try the grip with a single battery and see if some batteries seem to drain too fast on their own.