Fenix BC05R V2.0 Rechargeable Bike Taillight

Max Lumens: 15
Modes: 6
Battery: Built-in
(6 customer reviews)


The Fenix BC05R V2.0 is a rechargeable bike taillight built to keep cyclists safe. Be seen in traffic with its maximum 15 lumens of red signaling light. Six modes include different speeds of flash as well as different brightness levels so you can choose which mode best suits the current conditions. The built-in 400mAh Li-polymer battery delivers a maximum 120 hours of runtime (in low fast flash mode), which will last two months on a single charge if you commute 2 hours a day. Quickly charge the taillight via the Type-C interface. With the included body clip, you can also use the Fenix BC05R V2.0 Rechargeable Bike Taillight as a headlamp, chest lamp or backpack light. Rated IP66 rain proof and dustproof, this bike taillight will help make your bicycle commute much safer.

For commercial orders and large purchases, contact us at (888) 775-9996 x6, or
WARNING. Be aware of counterfeit Fenix merchandise in the U.S. marketplace.

Max Lumens: 15
Modes: 6


BC05R V2.0 Size

Length: 2.01” (51mm)
Width: 0.87” (22mm)
Height: 0.87” (22mm)

BC05R V2.0 Weight

0.99 oz. (28g) including battery

BC05R V2.0 Battery Type

Built-in 400mAh li-polymer battery.


Type-C charging cable, bicycle mounting strap, body clip


Limited Lifetime Guarantee from Fenix Lighting USA

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Additional Features of the Fenix BC05R V2.0 Rechargeable Bike Taillight

  • 15 lumens maximum output; 50 meters alerting distance.
  • 180° lighting angle.
  • 5 red light LED.
  • Built-in 400mAh Li-polymer battery.
  • USB Type-C charging port.
  • Ultra-compact and fashionable appearance.
  • Battery level indication for remaining battery level checking.
  • Single switch for easy and fast control.
  • Matched with the body clip, can be used as a backpack light, chest light.

Operating Instructions for the Fenix BC05R V2.0 Rechargeable Bike Taillight

Press and hold the switch for 0.5 seconds to turn on/off the light.

Output Selection
With the light switched on, single click the switch to cycle through Low→Low Flash (slow)→Low Flash (fast)→High→High Flash (slow)→High Flash (fast).


Operation: Remove the dust cover of the bicycle taillight to reveal the charging port, and plug the USB Type-C end of the charging cable into the light’s charging port, then connect the other end of the charging cable to a USB power adapter.

Indication: The indicator will display red while charging and will turn green when fully charged.

Battery Level Indication
With the light switched off, single click the switch to check the battery status, the indicator in the switch will last for 3 seconds.

  • Green light on: saturated 100% – 85%
  • Green light flashes: sufficient 85% – 50%
  • Red light on: poor 50% – 25%
  • Red light flashes: critical 25% – 0%

Low-voltage Warning
When the voltage level drops below 25% of the total level, the battery level indicator blinks red to remind you to timely recharge the battery. To ensure normal use, the light will not turn off automatically and will work till the battery level runs out.

Mounting Instruction

Mounting strap: First loop the mounting strap (without LOGO) around the small opening of the taillight, and place the taillight on the seat post (face up), then loop the other end of the mounting strap (with LOGO) around the other small opening of the taillight, adjust as the size of the seat post.

Body clip: Keep the body clip and the taillight both face up, push the small opening on both sides of the taillight downward to the spout of the body clip.

Note: The bicycle light is applicable to bike seat post diameters between 20mm-35mm.

Usage and Maintenance for the BC05R V2.0

  • Disassembling the sealed head can cause damage to the light and will void the warranty.
  • Recharge the light timely when the battery level is critical, for future use.
  • Recharge a stored light every 3 months to maintain optimal battery performance.
  • Periodic cleaning improves the light’s performance especially when the light flickers, shines intermittently or even fails to illuminate for the following reason:
    A: Poor battery level.
    Solution: Recharge or replace the battery.

If the above methods don’t work, please contact your authorized distributor.


  • The taillight is a high-intensity lighting device capable of causing eye damage to the user or others. Avoid shining the light directly into anyone’s eyes.
  • The LED of this taillight is not designed to replaceable; so the entire light should be replaced when the LED reaches the end of its life.
  • If any of the information provided in this manual is changed, the new version of the manual shall prevail; if your included user manual is an old one, it acquiesces that we won’t send a new manual.

6 reviews for Fenix BC05R V2.0 Rechargeable Bike Taillight

Based on 6 reviews
  1. Anonymous (verified owner)

    Fenix never disappoints.

    (0) (0)
  2. Jeffrey Komp (verified owner)

    Needs too be bigger, but still a good light.

    (0) (1)
  3. Howard M (verified owner)

    Nice product, can’t wait to use it.

    (0) (0)
  4. grandma (verified owner)

    Only used for a week or so, and it’s only ok. Switched all my lights (headlamp, bike headlight, bike taillight) to Fenix products. Thoughts:
    + One, simple, responsive button for all functions.
    + USB-C charging (even C2C, which a lot of manufacturers apparently fail to implement)
    + Perfect set of options (flashing for daytime, dim to extremely bright). No flashing or colors or other fluff to needlessly cycle through.
    + low price. But would prefer spending ~$50 to remove cons below.

    + / – Fairly bright, but only 5 LEDs and no internal reflector so it’s large area of light. I would feel safer if there was a larger area like the Magicshine, or much brighter like the Cygolite Hotrod 50.

    – no side visibility
    – mount options aren’t great for my needs. There’s a silicone strap that takes a while to add/remove if you take it off at every destination like me. Then there’s a plastic clip which may secure to a pannier/backpack strap, but nowhere else. Would like something that secure to bike like the Fenix frontlight
    – silicone flap for charge port. Silicone flaps I’ve had on other lights have ripped off after 2 years. Also they don’t have a positive feel when closing. You have to kinda squish it around to seat it properly. so it’s more likely to not close and get water in it.
    – integrated battery so can’t replace battery. I understand why though. 21700 batteries alone are $26, and this light is only $20.
    – does not remember your light setting when turned off/on like other Fenix lights
    – plastic doesn’t feel as nice as other Fenix lights with metal

    (0) (0)
  5. patrick houlihan (verified owner)

    Back charging rubber cover broke off right out of package. Seem dry rotted. Besides that I love the bicycle taillight. I affix it to my backpack.

    (0) (0)
    • Dianne (store manager)

      I’ve asked warranty to reach out to you to see what is going on with that.

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