The SP40 from Amazon arrived about 9AM this morning.
Everything was in the brown cardboard box that was stated in the Amazon ad.
Inside the SP40 was the 3000mAh 18650 Sofirn branded cell.
There's an insulator inserted between the cell cathode and tailcap spring
The cell shows 3.83 volts with voltmeter.A full charge to 4.2v in an Xtar VC4 added 810mAh capacity.
A protected button top Sanyo 3500mAh 18650GA fits and works well as does a flat top Panasonic 3600mAh 18650G