The needs are to examine/rebuild/maintain battery packs for my Roombas (14.4V NiMH) and DeWalt tools (18V NiMH or NiCd).
I was thinking of doing intensive examinations 6 cells per trial in order to find the lagging cells in the batteries. Then attempt to revive the weaklings or, worst case, replace them.
Well, unless you disassemble/reassemble the actual battery packs (to access the individual cells), I don't see how this product can help with that.
The DeWalt chargers are rather famous for being
very very good at what they do, which is charging (fast/slow/trickle) and maintaining pretty much any NiCD battery packs.
The best real improvement over the one that comes with the tool(s), is their fancier $100 15-minute quick charger. I have the older "Super Charger" model, and have no complaints.
Cheers