Normal overnight (Canon LP-E12) battery drain?

StrugglingforLight wrote:

Bought a refurb M200 from Canon. Unlike the camera and lens, the battery looks refurb (more likely used). Marks on the glossy black portions and no protective cover on the battery terminal.

I charged the battery fully at 7PM last night and stored it outside of the camera. This morning at 8am it required an additional 8-10mins to fully charge.

This "test" is meaningless. This battery is a 2 cell (2x 3.6V cells), so the last part of any charge is a very slow balancing to get both cells equally fully charged. So when you charge a depleted battery the charging rate (as in amps or milliamps of current flow) is relatively high, and the closer the cells get to fully charged the charger will drop the charging rate down to almost nothing to do the final balancing.

Next time put in in the camera and see what the remaining battery capacity is.

Battery was stored outside of the camera in the camera bag. Ambient room temp around 63-65 degrees Fahrenheit.

In usage terms: I got the camera last Tuesday. So a week since last fully charged. I took 20 pics (1 with flash on to test) and about 1hr setting up (screen on) in that span. Battery yesterday was around 50% based on the camera battery bar.

is all this normal? Thank you.

Also, I do disagree with the post above that says that these batteries don't lose charge sitting in the camera. They shouldn't drop much overnight, but over a couple of months (obviously the camera unused and turned off) they will certainly drop quite noticeably. This is normal.