Olight S1A Baton 0.5 Lumen Moonlight to Turbo 600 Lumen, Uses one AA Compact LED Flashlight (With 14500 Rechargeable Battery and USB Charger Kit) Brightest AA flashlight on the market - up 220 lumens with the included lithium iron battery and up to 600 lumens with a 14500 battery (sold separately) Incredibly long runtime with nearly 2 hours of power on high mode and up to 25 days in Moonlight mode using the included Lithium Iron AA Battery Perfect for everday carry - super lighweight contstruction, weighing in at less than 2 oz with battery installed Impressively versatile with unique built-in timer to turn the light on for 3 or 9 minutes so your light shuts off without having to get out of your sleeping bag. Also includes a no-slip pocket clip and magnetized tail cap for standing or attaching to magnetic surface for convenience and versatility Controlled by thermal protection program, the turbo mode is limited to 1 minute, and then the brightness gradually steps down to 50% of the initial brightness (only available when 14500 rechargeable lithium battery is used)