Any mod vapers using Ultra Fire Protected 18650 battery (from Hong Kong) in ecig or mod box? Are these okay since they are protected but from Hong Kong? I'm seeing good prices on eBay for these batteries. 2x Ultrafire 3.7V 2400mAh LC 18650 Protected Battery - eBay (item 270657208235 end time Dec-30-10 06:08:42 PST)