Dimension： 86.0 X 50.0 X 32.0mm Weight： 80 grams (light unit and battery) Light source： High intensity white LED X1 Light output： 2000cd Run time： Low mode ： approx 3hrs High mode： approx 1.5hrs Low mode： approx 3hrs Flashing mode ： approx 12hrs Battery： Li-Ion rechargeable battery (3.7V-1110mAh) Recharge time： approx 3.5hrs (USB2.0 recharge) Recharge/discharge number of times： about 300 times（until the rated capacity drops to 70% Other： Low battery & charging indicator, lighting mode memory function