******Sample size of ONE******
My partner and I initiated a foot pursuit the other night on a suspect who fled from us on a bike. He got a pretty significant head start on us but we decided to track anyway. My partner is using an MCH HC head. His light died halfway through the track. Dead. After we wrapped things up, we diagnosed the issue and the head itself is dead. It's on its way back to CD for replacement/warranty.
Not exactly comforting...