The PD35 V3.0 is powered by a single 18650 rechargeable battery (included), or can operate on two disposable CR123A’s. 1700 Lumens . This flashlight has a runtime of 230 hours when using the 5 lumen Eco mode. Boot-up battery level indicator lets you always know the battery’s status. On/off and momentary on are activated with the tail switch and six lighting modes are selected with the side switch.