The Sony VTC6A Battery is commonly preferred due to its high 20A continuous discharge current (also rated by Sony as 25A Max Continuous Discharge) and its high 3,000 mAh capacity.
Sony 18650 VTC6-A Battery Features:
Nominal Capacity: 3,000mAh
Maximum Discharge Current: 20A Continuous
Rated by Sony as 25A Max Continuous (Temperature limit of 80C)