Sony VTC6A rechargable battery not protected 3000 mAh Li-ion - 1 piece 

Sony 18650 VTC6 rechargeable battery type IMR lithium 3000mAh 3.7V unprotected, IMR High Drain battery 20 A. The Sony US18650 VTC6 cell is one of the best high current batteries on the market.

Sony VTC5A rechargable battery not protected 2600 mAh Li-ion - 1 piece 

A high-performance power cell developed by Efest from a safe chemical composition (lithium-manganese).

18500 cell developed for applications with very high current output.