According the A123 data sheet, 50C continuous and 120C 10 sec burst.
A123 - ANR26650M1-B
Cell Weight 76g
Cell Capacity (nominal/minimum) (0.5C Rate) 2.5/2.4 Ah
Voltage (nominal) 3.3V
Internal Impedance (1kHz AC typical) 6m
Power* 2600 W/kg
Recommended Standard Charge Method 2.5A to 3.6V CCCV...