I use "Sony 18650 30a Vtc5 2600mah Us18650vtc5 Two High Drain Batteries" seem great so far!
The average person doesn't need a 30a battery. With a regulated PV (like your vamo), and a normal topper with a +1ohm atomizer coil you will only be vaping at 2-3 amps. What is important with regulated PVs is that you stick to "high drain" LiMn chemistry. So there are several good batteries that will fit your needs.
Where you buy your batteries is more important than which of the good batteries you choose.
I like AW batteries, but understand, AW does not make batteries .... they TEST batteries, and only those that meet their specifications get the AW sticker.
AW Batteries - Authorised Dealers
use menu on right to find a local supplier.