At least I wonder if it is weak. Battery check on my 5DM3 shows 2, not 3, bars as condition. Does this mean anything?
I saw this on a DP Review Forum: I can't attest to the authenticity... but it does make sense to me. Original thread:http://www.dpreview.com/forums/thread/2506860
"I sent a note to Chuck Westfall asking:
"How does one "recalibrate" an LP-E6?"
His response was:
"...The answer to your question is; "You don't."
The section of the article you referenced is in error on this point, and it will be changed soon. Our apologies for any confusion the article may have caused.
Meanwhile, please refer to pages 28 and 192 in the EOS 5D Mark II instruction booklet for information on using the Battery Info screen properly. Bottom line, if the Recharge Performance indicator turns red, that battery pack should be discarded...""