[RE-wrenches] Lithium battery aging

[Jay]

Hi all

I hope some of you might know the answer to these questions. 

When a Lithium battery ages, is its voltage reduced?  If so by how much?  

Is the C rate reduced?

Is the only change lower amp hours?

And finally how does the BMS determine this reduction?  How does it know it’s lower capacity without doing a full to empty test?

The questions arise from a conversation about adding new to old batteries. 

Just trying to learn more. 

Thanks

Jay