ThruNite TC15 V2 2531 High Lumens Ultra-Bright Flashlight, USB Rechargeable LED Handheld Flashlights, CREE XHP 35.2 LED, Indoor/Outdoor (Camping, Security and Emergency Use) Cool White - Black CW;

TC15 Specification

LED: Cree XHP-35 LED.
Battery: 1 *IMR3100mAh 18650 ( included)
Dimension: 122.5mm*27mm*24mm
Weight: 71 gram without battery.
Reflector: Smooth Reflector
Aircraft quality aluminum body structure.
Premium Type III hard anodized anti-abrasive finish.
Waterproof to IPX-8 standard.
Output and run time:

-Firefly: 1 Lm(41.5 days),
-Low: 25 Lm(68 hours ),
-Medium: 250Lm (6.5hrs)
-High: 1050Lm(90 minutes),
-Strobe:830Lm(180minutes)
-Turbo: 2300Lm-820Lm (2mins+83mins)

Operation

Turn on /off
Press the side switch to turn the light on/off.

Change modes
When the light is on, press and hold the side switch to cycle through low, medium and high. Shortcut to firefly: When the light is off, press and hold the side switch to get firefly mode. Double click to turn to turbo from any mode. Another double click to get strobe.

Memory Function:
The light will turn on in the last mode accessed, except for except firefly, turbo and strobe.

Rechargeable function:
During charging, the indicator is RED. After being fully charged, the indicator will be BLUE. When indicator flashes purple, it means abnormal charging. Only firefly and low modes are available while charging.

Notes:
The above parameters tested with one ThruNite 3100mAh 18650 IMR battery are approximate and may vary between lights, batteries and environment.
Remove the insulator piece from the flashlight before first time use.