Runs for 2 hours 5 minutes to 50% intensity, and 3 hours 50 minutes overall.
New style KL1 bezel; measures 1,140,000mcd at a current draw of 490mA
This is the two cell configuration.
Runs for ~55 minutes to 50% intensity, and 4 hours 50 minutes overall.
I don't have intensity or current usage values for a one cell setup.
This is the one cell configuration.