well, yesterday my jetbeam intellicharge i4 li-ion battery charger showed up for my flashlight, I broke the batteries out of the package (AW 18650 3100mAH) ran them dead in the light and then fully charged them in my intellicharge i4. Soon as they were fully charged I popped one in my sunwayman v20C at full brightness and let it run.
lasted a full 2 hours and 55 minutes exactly at 480 lumens before it started flickering which is normal behavior for this light, its handy because you can turn the brightness down and squeeze the last out of it.
The site says the light lasts 2 hours at full brightness:
http://www.sunwayman.com/html/products/201106/52.htmlGetting 3 hours out of it is making me a super happy and impressed camper.
