battery draining weirdness

[GPB]

Happy Holidays Everyone !! I recently picked up a PT Fuel headlamp and have been happy with it but noticed it was dimming much earlier than I expected ( it's supposed to have a 50 hour burn time on high ). I pulled out the batteries and tested them with a volt meter. 2 batteries were perfect ( 1.6 v ) and one was completely spent ( 0.6 v ) I thought perhaps I mixed up the batteries when I put them in, and installed a spent one. So I put 3 fresh cells in, and left it on overnight. This morning the cells read 1.6, 0.9, 0.5. and it was noticeably dimmer after only 7 hours. Every other light I've had drains cells at the same time and rate. Does anyone have any ideas why this might be happening ??

Thanks.

 

[Marduke]

Another victim of direct drive, alkalines, and false advertising.

The runtimes will never be achieved, sorry.

 

[GPB]

I wasn't really expecting the full runtime, as I assume all marketing figures to be inflated, but I did expect all the batteries to have the same voltage when I checked them.