I want to purchase vamo v5 or v6 but dont know which 18650 batteries to get from fasttech. Can anyone whom uses fasttech batteries please advise as i was looking at $10.20 Panasonic CGR18650CH Rechargeable 2250mAh 3.7V 18650 Lithium Batteries 2-pack - authentic cells / 2-pack at FastTech - Worldwide Free Shipping Thanks 