Salvaged from a 2017 Hybridlight Journey 250 like this one . Similar to a Samsung 35E, but the pink is duller, the ring is grayer, and the positive terminal has 5 “legs” instead of 3. My MC3000 got 2059 and 2016 mAh at 500mA discharge.
The flashlight mostly sat on a window sill fully charged until the electronics died. The cells read 4.05V and 4.07V when I pulled them.
Thanks!
Probably just a generic 2000mAH cell in a pink wrapper. 30Qs will read in the low 3000s when new, generally spot-on. So unless they were, say, 3000mAH cells that coincidentally lost exactly 1/3 of their capacity, my bets are on halfway decent 2000mAH cells.
OK, nothing special then. These were the first lions I salvaged and I didn’t blow myself up so still callin’ it a win! 
18650 Lithium Ion Battery Identification Reference
2nd Life Storage Cell Database
Couple handy references.
Going by the links provided by flydiver, my guess would be possibly the BAK or FST ~2200mAh 18650s (both have 5-lobe top).
The color of the wrap can sometimes change (for some Chinese manufacturers).
If you can check the print label (if any) on the battery. And also get the weight (preferably with 0.1gram precision).
You may want to try a discharge at 1A, then 2A since your charger can do that. Some old cells will do fine at 500, but not support higher drains. So….depends on what you want to do with them.
Note - I do keep some ‘apparently safe’ old/lame cells around for low volt cut-off testing in lights. They will drop voltage early and show if the light has that feature, without risking a good cell.
Those are handy. Thanks!
Maybe I’ll very carefully try them at 1A+ 
The light they came from tops out at 250 lumens so I’ll probably only use these in low-draw situations. Testing LVP and such. Or maybe they have an interesting charge/discharge curve for testing chargers!