... aircraft-grade aluminum 3) Uses four 1.5V D (Ni-MH, Aluminum led flashlight: Uses Cree XM-L LED with a ... lifespan of 50000 hours• Uses four 1.5V D (Ni-MH, Alkaline) batteries• 354mm (Length)x40mm (Diameter)x62.5mm(Head)• 407 ... above-mentioned parameters (tested by four high-quality D Ni-MH batteries with a measured capacity of 9000mAh in Lab) are ...