Ok, here are the basic features of the chargers that I want:
1. Adjustable charging current (0,1A-3,0A) in 0,1A steps.
2. Support for multiple chemistries (NiMH, lithium-ion, lithium ion HV, LiFePO4).
3. Temperature monitoring (45C max below 2A, 60C max below 3A).
4. 4 cell channels, with support for AAA sized cells all the way to the largest 21700/26650/D cells up to 78mm length.
6. Full current cutoff according to charging current (10%).
7. 12V-20V compatibility.
8. Nickel coated phosphor bronze/brass rails for highest conductivity and accurate internal resistance measurement. Or just well plated nickel plated A3 steel if everything goes wrong.
9. Internal resistance measurement.
10. Low voltage recovery
Below 2,5V, charge at 150mA.
Below 2,0V, charge at 100mA.
Below 1,0V, charge at 25mA.
11. Adjustable max voltage for lithium ion charging: 3,90V-4,20V in 0,1V steps.
12. Storage charge mode: 3,6V. Lower would be better, but it is too low otherwise for most people.
13. Individual channel selection.
17. Automatic charging current adjustment available.
Other features are nice, but not necessary.
If I can get them on this BLF charger, that would be dope.
These are the bare minimum requirements for me.