I have an old Streamlight Stinger that stays on it's charger for backup, but its SIX DOLLAR bulb isn't remotely as bright as an LED. I use a flashlight at least one and closer to two hours a night/early morning. Current carry for those nocturnal pastoral perambulations is a Fenix PD 32UE. Very well built and a good, but not cheap value in spite of being a China import. I'd reconsider a rechargeable if I were you. Good single use batteries cost an arm and a leg and the dollar store variety will fail you when you need them the most.

Fenix PD32 UE Ultimate Edition 740 Lumen CREE XM-L T6 LED Tactical Flashlight with Customized Diffuser Tip and Two EdisonBright CR123A Lithium Batteries.: Basic Handheld Flashlights: Amazon.com: Industrial & Scientific