poor performance curve with consequences

The battery pack has the following problem with me. If the capacity is running low, the device turns off abruptly. Without warning. In the original battery still is an indication "Battery empty". In the original battery can I still repeatedly turn the camera on (even if that makes any sense). So in this VHBW battery performance curve is falling away.
I mention this now so why exactly because this results in another problem. After switching off the VHBW battery do I change this or invite him. After the Shake Reduction no longer goes and the camera wants from me, that I can enter the focal length. But does not work and I have to reset the entire camera, in which case my already customized settings are deleted. Very uncomfortable.