Jerry....Canon confirmed that it could be a glitch in the camera (surprise surprise). This has happened each and every time with over 30 Canon-branded batteries, and with the same results consistently. I do think this can be seen more easily when using the camera for video rather than photo as, while recording, the camera simply shuts down.
That's aggravating. Hope the warranty process goes quickly and smoothly.
Yeah, all li-ion electronics have a safety cut-off that shuts down the device before it zeros out the battery, because li-ion batteries cannot recover from a total depletion. So it sounds like the camera's safety cut-off is kicking in way too early. I doubt it's a firmware glitch; I'm pretty sure the firmware only gets the battery information from the actual circuitry that checks the battery's voltage. Maybe the upcoming Canon robot workers will have better quality control.