SANYO Lithium-ion battery NCR18650GA 3450mAh 10A 3,6V

This is an excellent cell for building Power Banks, Battery Packs, BMS's, and also for using in High Performance Flashlights. Just one of the many attributes that this cell has, is it's capacity of up to 3,500 mAh making it one of the highest capacity cells in the 18650 form factor. It also has medium-high discharge/drain capabilities without any significant capacity fade. These types of attributes explain why it's an extremely popular for many devices, but also used in Electric Vehicles and E-Bikes as well. It can deliver up to 10 Amps of Constant Discharge without any sweat or any stress to the cell, while having the ability to give you up to 3,500 mAh in capacity.
 

This also makes it a "Top-In Class" selection within the 18650 form factor for Ultra-High Capacity with Medium-High Discharge/Drain capability. In applications such as Power Banks and Flashlights these cells will give you the best overall performance with maximum run-times.