The Sony VTC5A is one of the best 18650 batteries money can buy. With the best amp draw to mAh ratios, they are a fantastic all-round battery that suits the majority of applications.
The Sony VTC5A is a top-performing 25A 2600mah battery. It runs at a higher voltage than the LG HG2 and Samsung 25R, and runs for almost as long as the VTC5
Efest 18650 - 2500mah High Drain Lithium Ion Battery (25EF)
Sanyo 20700B 4000mAh Lithium Ion Battery
Efest 20700 3100mAh 30A Battery
Samsung 30T 21700 35A High Drain Lithium Ion Battery