That is wrong. Power is a limiting factor. It will charge a 3s or 4s 5Ah at 1C, but not a 6s.
@emry7368 that's a good pack. I've been using 4000s of the series in my 6s Arrma for a while. Still balance out nicely. I did replace the balance plugs after 50+ runs, though.
Yes, but for e.g. a 5000mAh 6s lipo you need 6*4.2*5 = 126W to charge at a reasonable speed (1C). You can of course charge at a lower current but it'll take longer.
I had that 80W accucell, a good charger.