03-14-2014 01:08 PM - edited 03-14-2014 01:13 PM
I'm not aware of any memory effect with Li-Ion batteries, such as those used in the 7D. Conditioning of batteries is useful for NiMH types which are prone to freezing up, preventing access to the full cell(s) during recharging. It's almost embarassing to say I know this from my electric r/c truck racing days. Canon even included a refresh or calibrate button on chargers (limit of my knowledge is soon to be exceeded).
The refresh/calibrate buttons are not on the LC-E6 charger not because it was "decontented" but, IMHO, because it was unnecessary.
I will say this about batteries. If Li-Ion batteries vary in perfomance from one cell to another, as was the case for the NiMH cells I used for racing, then I wouldn't be surprise if you just got a bad pack.
03-14-2014 03:37 PM
This is from Canon............................................
Canon LP-E6 Battery Pack when used with the Canon LC-E6 Charger
(Compatible with Canon EOS 5D Mark III, EOS 5D Mark II, EOS 6D, EOS 7D, EOS 70D,
EOS 60D, EOS 60Da)
In rare cases, the orange lamp on the Canon Battery Charger LC-E6 will blink rapidly at regular intervals when the Canon Battery Pack LP-E6 is inserted. In such cases, charging the Canon Battery Pack LP-E6 in the Canon Battery Charger LC-E6 is not possible.
This symptom may occur when a Canon Battery Pack LP-E6 has been discharged due to being unused for a prolonged period of time, such as when it is first purchased.
If this occurs, please follow the procedure below.
03-14-2014 05:14 PM
03-18-2014 07:05 PM
I was having the same issue with my 7D. The battery seemed to drain just sitting in the camera. The problem battery was a Canon battery that was supplied with my 7D, which is still in warranty. I called Canon about the problem. The customer service advisor had me check the menu for the battery information (looks like a wrench head with three dots) I selected the information, and the battery was only at 26% with 129 clicks on the shutter since removal. As I was doing what the tech said, the battery discharged another 5%, and the clicks remained the same. The tech said it was a bad battery, took my shipping info, and sent me a new Canon battery. I also use a Watson battery for the 7D, and it has not had simular problem. I suggest recharge your Canon battery, install in the camera, go to the Battery Info, note the full charged battery level. Allow the camera to sit idle in the off position over night, and check it again. If the battery has become discharged 5-10% call Canon, or just buy a new battery if yours is out of warranty. Good Luck.
03-24-2014 02:24 AM - edited 03-24-2014 02:26 AM
Ok what I did was charged the battery full and then I started using it. After taking just about 100 shot I uploaded them in my pc and then checked the battery performance and it was 80%. So in my view it was ok and started to realize that the battery might eventually start perfoming fully after some drain recharge cycle. But still I wasn't out of the thought that the battery still might be faulty or something must be wrong with my camera body. Funny part is if I browse through the menu of my camera from the back lcd display for about 1-2 minute the battery losses power 3-5%, Odd.
After reading your comment I decided to do another test to see if the battery was draining just by sitting in the camera. So I turned off the camera and put it aside for 2 days leaving the battery inside. After 2 days of no use I turned on the camera, checked the battery and the battery drained 4%. Now the t3i does not show battery percentize so I don't know if this is normal that the battery drains just by sitting idel in the camera even when the camera is turned off.
03-24-2014 10:23 AM
I was just reading through your thread to see if you mentioned owning another battery.
From what I'm reading, it really sounds like you have a bad battery that can't hold a charge. It is not normal for a camera to lose so much power so quickly with a small amount of use.
If you do not own another battery, you'll probably want to get one anyway, but even if you know someone with a camera that uses the same battery you could test it. Assuming this was purchased from an authorized dealer, you should either swap it for a replacement or contact Canon.
03-24-2014 03:19 PM
All Canon cameras do continue to use a small amount of power when completely turned off. If I don't use one of my cameras for a couple months, it's main battery(ies) will be largely discharged. (Note: I use battery grips with 2X the number of batteries, plus my cameras use LP-E6, which are about twice the capacity of your camera's battery.)
If you got 100 shots with 20% of the battery in a T3i, I would consider that pretty close to normal. I believe the LP-E8 battery in your camera is rated for around 470 to 550 shots per charge (depending upon ambient temperature.... colder weather reduces total shots). Using Live View cuts this more than in half. Shooting video or extensive images playback and menu use of the LCD will reduce the number of shots, too.... though a 3-5% loss with 1-2 minutes using just the menu seems a little excessive.
03-24-2014 03:48 PM
I just got back from Atlanta from a week long assignment. I am currently editing 800 photos with about another 50 rought edit deletes. Maybe another 50 - 75 deletes right on the camera. Both are showing close to 50% left.
I also use battery grips and had my 7D and 5D2 with me. I didn't charge either all week. I probably had a camera in my hands 18 hours a day.
Back to editing. There is always another deadline to meet.
03-25-2014 08:01 AM
03-25-2014 08:15 AM
I still don't wanna lose hope with my 7D and the battery. So I will continue using it for another 2-3 weeks giving the battery some drain recharge cycle and try to get good amount of shots. Judging by the performance it gives me in that time I will then decide what to do.