Yes - a much detail as possible for each individual slot is a great thing.
The only item I can think of that I’d want is a Time in Mode for each slot. Knowing that your questionable cell has been taking in 300mA for 18 hours can be useful…
No!, not to too complex, not to complicate, the simple to be the most useful.
Yes to measure impedance (internal resistance).
Yes measure capacity (in discharge).
Yes to storage load (3,7V ).
If load 3.6V (LiFePO4), 4.20 / 4.35V (Li-ion), 1.48V (Ni-MH / Ni-Cd and 2.0 Ni-Zn.
If manual / auto charge selection.
Long bays (slots) (if you can still change casing design), future 26,800?
Just wondering if there should be a timer cut-off (eg. if battery has been charging for over xx hours, stop charging since it means the battery may not be taking in to long to charge, indicating a bad battery)… Although selecting a very low charge current to a very high capacity battery will also result in charging for very long hours… so I’m not sure how this would be done.