Olight R20 Javelot 900 Lumens CREE XP-L HI LED Flashlight with 2600mAh 18650 Battery Micro-USB Port Rechargeable Waterproof with SKYBEN Holster Three brightness levels: 900 lumens / 3 minutes + 450 lumens / 2.5 hours. Includes a high quality customized 2600mAh 18650 rechargeable Lithium Ion 18650 battery . The R20 Javelot can also use standard 18650 batteries (Will not support Micro-USB charging). Built-in charging circuit using a 1000mAh 4.2V constant current for consistent charging. Charging port inside the neck of the flashlight using a protection ring for dustproof and waterproof