d_t_a
(d_t_a)
27
Will also suggest the Miboxer C4-12 (charge current is selectable, and it shows IR relatively reliably — for checking conditions of various cells).
The SkyRC MC3000 is probably the top-of-the-line and it’s about twice or more as expensive as the C4-12, but MC3000 seems to be the best (or most functionality that the common people probably won’t get to use).
Both of the above can charge 4x 26650 at 3A at the same time. (both come with a beefy 60 watts power supply brick)