The better quality cells like lishen and BAK china brand 21700 cells have prooved to be good performers, on ES they have been given a 1k charge /discharge testing by member padja in the czech republic.
Lishen SD model new 4885mah /0.2c, 4211 /1c, 3981/2c.
1000 cycles 4593/0.2c, 3983/1c, 3641/2c...