You can't go wrong with the VTC6. Little voltage sag, high current capacity, and only 100mAH less REAL capacity than the NCR18650B (200mAH less than the NCR18650GA) make for a winning combination. There just isn't a better all around battery available. Other batteries my beat it in certain areas, like price, capacity, and current draw. But with the exception of price, NOTHING out there beats the VTC6 in any area by a huge margin. And you tend to give up ALOT to get that little bit more. For instance, the NCR18650GA gives up a relatively large amount of current capacity and voltage say for 200mAH greater capacity. And the VTC5 gives up LOTS of capacity to get maybe 5A greater draw.
