I have the 2 x 18650 Aurora P7 (and very good it is too).

Here's some of the measurements I've taken:

On high:
Runtime = 2 hrs 16 mins (continuous)
Current draw from battery = 1.16A (measured) Voltage unmeasured
Voltage at P7 = 3.34V (measured)
Current at P7 = 1.42A (calculated)
Estimated Watts @ LED 4.7W
Lumens = 400 ?

On low:
Runtime = 5 hrs 43 mins (continuous)
Current draw from battery = 0.6A (measured) Voltage unmeasured
Voltage at P7 = 2.99V (measured)
Current at P7 = 480mA (calculated)
Estimated Watts @ LED 1.4W
Lumens = 140 (estimated)

Resistor in tailcap = 7.5 ohms (measured)

Battery recharge time 7 hrs 50 mins

Weight inc. batteries 374 g (13.2 oz)

Hope this is of some help to you, see my signature for the review thread or ask if there's anything else I can let you know.