The battery -Management Canon offers a practical added value of working with no replica battery.
This Management informed the appropriate camera menu on state of charge, possible images and life of all lead acid batteries used. So you know already before the onset whether the battery is still loaded or to be what.
The handling is very simple, use battery and select Register in the appropriate menu item.
Why you have to install the necessary serial number for the battery itself will always be a mystery forever.
Conclusion - reliably and without competition but too expensive