If considering AW IMR Batts I would ALWAYS take the 1600 over the 2000 Holds much higher voltage under load than the 2000. I change out my batts between 3.85 and 3.9. You can tell a difference. I still have AW IMRs, but find the MNKE IMRs hit even harder and voltage lasts longer under load. Try one that is not a fake and see for yourself. When I vape - I want power. I wish MNKE would make 18350, that would be awesome.
Maximum Continuous Discharging Current 20 A
Maximum pulse Discharging Current 60 A
Maximum Continuous Charging Current 6.5 A
Maximum Rated Discharging Current 30 A
Nominal Voltage 3.8 V
Maximum Charge Voltage 4.2±0.05 V
Temperature Range/Discharge -20~60degree
Temperature Range/Charge 0~45degree
Temperature Range/Storage -20~35 degree
Internal Resistance at Shipping 23±1 m
Length: 65.5 mm
OD 18.28mm
Load testing of Panasonic vs AW 1600
At first glance, you may be impressed by the much larger mAh of the Panasonic, but keep in mind, all that extra mAh comes after the battery is discharged below 3.5 Volts, up until that point, the AW IMR holds a higher voltage under load and achieves more mAh.
http://www.e-cigarette-forum.com/forum/super-t-manufacturing/295446-load-testing-panasonic-imr-18650-2250mah-cgr18650ch-stock.html