Olight S20R Baton S20 18650 Rechargeable Cree XM-L2 550 Lumen LED Flashlight Magnetic Tail Cap, USB Charging Dock with two LegionArms CR123A Batteries Max output of 550 lumens using CREE XM-L2 Cool White LED Includes patent-pending Micro-USB charging dock and a 2600 mAh 18650 rechargeable battery Low-profile side switch featuring a battery power indicator, which glows red when battery runs low Glow-in-the-dark o-ring in bezel to help locate flashlight from accidentally dropping it This bundle includes S20R pack and two LegionArms CR123A lithium non-rechargeable back-up batteries