The Nitecore BR25 bike light has a maximum output of 1400 lumens, so it is recommended to use it with the Nitecore NL2150R 21700 lithium-ion battery that comes with the light.

Other power sources can also be used:

• 1 x 18650 (when the discharge current exceeds 8A)
  
• 2 x CR123 disposable batteries
• 2 x RCR123 Li-ion batteries, all of which must be placed in the included battery box before using the BR25.

The BR25 features a diffuse reflection design that reflects light off the road surface to form a focused and bright, short-range lighting zone. It also ensures that there is no blind spot under the front wheel and that the beam does not shine directly into the eyes of oncoming pedestrians or drivers.

The flashlight has four brightness levels and a warning flash, which are controlled by a single button. The switch has a built-in power indicator so you know when it's time to charge or replace the battery.

The BR25 comes with a universal bike mount for quick and easy-to-use installation and removal. The bike light can be used as a portable flashlight with a convenient lanyard.

Brightness levels:

Powered by 1 x 5000mAh 21700 Li-ion battery

• Turbo: 1400 lumens - 2 hours 30 minutes
  
• High: 430 lumens - 3 hours. 15 minutes
• Middle: 170 lumens - 12 hours.
• Low: 28 lumens - 60 hours
• Flashing warning: 1400 lumens

Operates on 2 x CR123 batteries

• Turbo: 820 lumens - 1 hour 15 minutes
• Large: 430 lumens - 2 hours.
• Middle: 170 lumens - 5 hours 15 minutes
• Low: 28 lumens - 26 hours
• Warning Flashing: 820 lumens

Maximum beam distance - 163 meters with 21700 battery or 119 meters with 2 x CR123 cells.

IP68 waterproof and shockproof up to 1 meter.

Complete set:

• Nitecore NL2150R 21700 Rechargeable Li-ion Battery with Built-in USB-C Charging Port,
• USB-C charging cable,
• Bicycle holder (with 2 x thin mounting pads),
• 2 x thick mounting pads,
• Spare ring, belt.