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Fenix BC21R V3.0 Rechargeable Bike Light

$98.00 $74.95

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Out of stock

Max Lumens:
1200

Modes:
5

Battery:
18650 or CR123A
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SKU: BC21RV3GYN/ABarcode: 6942870308623N/A

Product Overview

The Fenix BC21R V3.0 rechargeable bike light is now brighter with a maximum 1200 lumens of light helping you see a maximum distance of 466 feet (142m). Four brightness levels let you choose the right amount of light for your ride and the flashing mode is a great way to make sure you are seen by other motorists. Don’t worry about the elements because the BC21R V3.0 is dustproof and waterproof. And its also impact resistant if you happen to take a spill. USBC rechargeable with battery level indicator, the BC21R V3.0 is the bike light you need to keep you riding long into the night.

Specifications

Max Lumens: 1200
Max Beam Distance: 466 feet (142 meters)
Max Runtime: 33 hours
Lighting Modes: 4 brightness levels plus flashing mode
Bulb Type: Luminus SST40 LED
Size: Length: 4.25” (116mm) Width: 1.06” (31mm) Height: 1.14” (30mm)
Weight: 5.54 oz. (157g) including battery
Battery: One included rechargeable 18650 li-ion battery or two CR123A lithium batteries
Included: Fenix ARB-L18-2600 rechargeable li-ion battery, USB type-C charging cable, quick-release bike mount, spare O-ring
Warranty: Limited Lifetime Guarantee from Fenix Lighting USA

More Information

  • A Luminus SST40 LED with a lifespan of 50,000 hours.
  • Included a 2600mAh/18650 Li-ion battery.
  • USB Type-C charging.
  • Quick-release design, two-step assembly and disassembly.
  • Easy and fast operation with a single switch.
  • Boot-up battery level indication and low-voltage warning.
  • Made of durable A6061-T6 aluminum.
  • Premium type HAIII hard-anodized anti-abrasive finish.
  • Mount fits handlebars from 28mm-35mm
Fenix BC21R V3.0 Rechargeable Bike Light specs chart

Runtime

Fenix BC21R V3.0 Rechargeable Bike Light runtime chart

On/off 

Press and hold the side 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→Med→High→Turbo. 

 

Flash Mode 

With the light switched on, double click the switch to enter Flash mode, single click again to exit flash mode and return to the previously used mode.

 

Intelligent Memory Circuit 

The bicycle light memorizes the last selected output excluding Flash mode. When turned on again the previously used mode will be recalled.

 

Battery Specifications 

Type

Dimensions

Nominal Voltage

Usability

 

Fenix ARB-L18 Series

18650

3.6V

Recommended

√√

Non-rechargeable Battery (Lithium)

CR123A

3V

Usable (no charging)

 Rechargeable Battery (Li-ion)

18650

3.6V

Banned

×

 Rechargeable Battery (LiFePO4)

16340

3.2V

Banned

×

 Rechargeable Battery (LiFePO4)

18650

3.2V

Banned

×

Warning: *18650 Li-ion batteries are powerful cells designed for commercial applications and must be treated with caution and handled with care. Only use quality batteries with circuit protection will reduce the potential for combustion or explosion; but cell damage or short circuiting are potential risks the user assumes.

 

Battery Replacement

Unscrew the tail cap and insert the battery following the polarity marks, then screw the cap back on.

 

Charging 

  1. Switch off the light and open the USB cap to reveal the USB Type-C charging port and plug the USB A socket of the charging cable into an electrical outlet, then connect the USB Type-C socket of the charging cable to the light. 
  2. The indicator will display red while charging and will turn green when fully charged. 
  3. Once charging is completed, be sure to tighten the USB cap to maintain the dustproof and waterproof ability.

 

Note:

  1. The normal charging time of the included Fenix ARB-L18-2600 is approximately 2 hours from depletion to full charging.
  2. Recharge a stored light every four months to maintain the optimum performance of the battery.
  3. The Low/Med mode is available while charging, but the charging time will be prolonged.

Note: This only works with Fenix ARB-L18 Series 18650 rechargeable Li-ion battery.

 

Battery Level Indication 

Single click the switch when the light is switched off, the indicator will indicate the battery level and 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% - 1%

Note: This only works with Fenix ARB-L18 Series 18650 rechargeable Li-ion battery.

 

Intelligent Overheat Protection            

The light will accumulate a lot of heat when used at relatively high modes for extended periods. When the light reaches a temperature of 60°C or above, the light will automatically step down a few lumens to reduce the temperature. When the temperature drops below 60°C, it will then allow the user to reselect the modes. 

 

Low-voltage Warning 

When the voltage level drops below the preset level, the bicycle light is programmed to downshift to a lower brightness level until Low mode is reached. When this happens in Low mode, the battery level indicator constantly blinks red to remind you to recharge or replace the battery. 

 

Note: This only works with Fenix ARB-L18 Series 18650 rechargeable Li-ion battery.

 

Usage and Maintenance 

  • Disassembling the sealed head can cause damage to the light and will void the warranty.
  • Fenix recommends using only a high-quality protected battery. 
  • If the light will not be used for an extended period, remove the battery for proper storage.
  • Unscrew the tail cap or remove the battery to prevent accidental activation during storage or transportation.
  • Long-term use can result in O-ring wear. To maintain a proper water seal, replace the ring with an approved spare.
  • Periodic cleaning of the battery contacts improves the light's performance as dirty contacts may cause the light to flicker, shine intermittently or even fail to illuminate for the following reasons:
    A: Poor battery level.
    Solution: Recharge or replace the battery.
    B: The contact or contact point of the battery or bicycle light is dirty. 
    Solution: Clean the contact points with a cotton swab soaked in rubbing alcohol.

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

 

Warning

  • Do place this light out of the reach of children!
  • Do NOT shine the light directly into the eyes of anyone!
  • Do NOT shine flammable objects at close range, to avoid burning objects or causing danger due to high temperature!
  • Do NOT use the light in inappropriate ways such as biting in the mouth, to avoid personal injury or life threats when the light or internal battery fails!
  • This light will accumulate a lot of heat while working, resulting in a high temperature of the flashlight shell. Pay attention to safe use to avoid scalding.
  • Turn off and lock the light or remove the battery from the light to prevent accidental activation when the light is placed in a closed and flammable environment such as pockets and backpacks!
  • The LED of this flashlight is not replaceable; so the whole light should be replaced when the LED reaches the end of its life.

FAQs about Fenix BC21R V3.0 Bicycle Light 

 

Q1. What kind of LEDs are used in BC21R V3.0? Does Fenix offer to replace LED? 

A: A Luminus SST40 LED with a lifespan of 50,000 hours. 

Fenix does not provide LED replacement services for the time being, and users are not recommended to replace the LEDs independently, which may affect product performance and cause product damage. 

 

Q2. What is the color temperature of BC21R V3.0? 

A: Around 6000K. 

 

Q3. What is the working voltage of BC21R V3.0? 

A: Voltage: 3.6V. 

 

Q4. Is BC21R V3.0 rechargeable? How long is the charging time?  

A: BC21R V3.0 is rechargeable with a USB Type-C charging port and the included 18650 battery. The charging time is about 2 hours. (The indicator will display red while charging and will turn green when fully charged.)  

Note: Once charging is completed, be sure to tighten the light head to maintain the dustproof and waterproof ability. 

 

Q5. How to prevent accidental activation of the BC21R V3.0? 

A: Unscrew the tail cap or remove the battery to prevent accidental activation during storage or transportation. 

 

Q6. Why does the BC21R V3.0 downshift to a lower mode after being used for a while and the higher mode cannot be selected? 

A: There are two reasons:  

1. Intelligent Overheat Protection  

The light will accumulate a lot of heat when used at relatively high modes for extended periods. When the light reaches a temperature of 60°C or above, the light will automatically step down a few lumens to reduce the temperature. When the temperature drops below 60°C, it will then allow the user to reselect the modes. 

2. Low-voltage Warning 

When the voltage level drops below the preset level, the bicycle light is programmed to downshift to a lower brightness level until Low output is reached. When this happens in Low output, the battery level indicator constantly blinks red to remind you to recharge or replace the battery.  

 

Note: This only works with Fenix ARB-L18 series 18650 rechargeable Li-ion battery. 

 

Q7. Why does the BC21R V3.0 happen to flicker? 

A: Poor battery level. 

Solution: Recharge or replace the battery. 

B: The contact or contact point of the battery or bicycle light is dirty.   

Solution: Clean the contact points with a cotton swab soaked in rubbing alcohol. 

 

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

 

Q8. What kind of battery can be used in BC21R V3.0? 

A: Fenix ARB-L18 Series Li-ion battery are recommended.  

Other Li-ion batteries are not recommended. As Higher modes fail to light up due to current and voltage limitation, an unmatched battery may cause the light to fail to work normally. 

 

Q9. What are the optional accessories for BC21R V3.0? 

A: ALD-08, ALD-10. 

 

Q10. Is the BC21R V3.0 battery port waterproof?

A. The light is waterproof so long as the battery port cover is in place.

 

Q11.  What should I do if the BC21R V3.0 needs repair? 

A: 1. 15-day replacement: Fenix will replace identical or equal products with documented manufacturing defects within 15 days of purchase. 

2. 5-year free repair: Fenix will repair a light free of charge within 5 years (non-detachable light: 2 years, rechargeable battery and other accessories: 1 year) of purchase if problems develop with normal use. 

3. Lifetime maintenance: If repair is required after 5 years from the date of purchase, Fenix will charge for parts. The total repair fee is dictated by the cost of the replaced materials. 

4. If you need warranty service, fill out the warranty form at https://www.fenixlighting.com/pages/warranty-repairs to start your repair claim.

Product Videos

Customer Reviews

Based on 19 reviews
68%
(13)
16%
(3)
5%
(1)
5%
(1)
5%
(1)
E
Eric

Doesn’t seem the battery life is any better than light & motion lights, plus L&M appear to be a stronger more direct light

P
Peter

Awesome product! Highly recommend this for bikepacking and touring.

a
alan
5 years and still going strong

It's 2023. I purchased a previous version of the BC21R five years ago in 2018. It's the most dependable part of my bike. It's survived 3 crashes and 2 drops and is still on the original 18650 battery.

I ride on roads during the day and always use the light in flash mode (15-20 hours a week, 2-4 hour rides) I ride before sunrise and use the light primarily in medium mode but switch to high mode when it's darker. (20-40 hours a year) Flashing and high mode slightly degrade my night vision.

I've never measured but I'm guessing I get 5-9 hours of life on flash mode with a 5 year old 18650 battery. 95% dry roads.

Only nit... At some point, bike mount lost some grip on handlebars. After riding on rough roads or hitting a pothole, I sometimes have to adjust it up/down a little.

Why a review after 5 years? I went to recharge my light and realized that it may outlast my bike.

T
T.T.
Runtime/output table is misleading

Looking at the graph above, stated outputs in the table are not for the full duration of the listed runtimes. The light is kind of useless to me if the 400lumens output is only sustained for 2 hours..especially with the spread of this light. If it had a more bike specific hotspot, it could work, but that is not the case.. Fenix still has some work to do here.

The runtimes in the ANSI chart are the runtime including the drop downs for overheat protection and to help extend the battery life. The graph shows you how long you can expect at each level and what it will drop down to for approximately how long before the battery will be out. The slight drop downs in lumen level help to preserve the battery as opposed to having the output remain the same level and then the light suddenly dies because the battery has been depleted.

J
J.F.
Good light meh battery

As others have noted, the advertised run times are absolute fantasy. My experience has been about 15 hours in the flash mode.

The battery indicator goes from green to red without pausing on yellow, so no reliable indication of how much juice is left.

GREAT mount and form factor.

Hi John - thanks for your review. While the factory does not provide us with a runtime for the flash mode, we find that generally speaking, it has been around twice as long as the runtime for the 'non-flashing' mode with the same lumen level. For the BC21R V3, the flash mode is 400 lumens, thus the runtime when the light is just ON at 400 lumens is 6 hrs. 30 minutes. Based on the estimated runtime that flash mode is about twice that, our best guess for the flash mode run time would be 13 hours, or about 2 hours less than what you are getting from flash per your review. I'm not sure if you are having a problem with one of the other modes and the listed runtime? If so, feel free to reach out to our warranty department. I have listed their info below.

As for the battery indicator, there is no yellow light regarding the battery. The following is from the instructions for the battery indicator:

Battery Level Indication

Single click the switch when the light is switched off, the indicator will indicate the battery level and 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% - 1%

Here is the contact info for our warranty team, should you have questions or problems with the other runtimes:

warranty@fenixlighting.com
888-775-9996 ext 1
https://www.fenixlighting.com/pages/warranty-repairs

E
Erik Figuracion
It's an ok light if you use it as at High Setting, Turbo is basically useless.

First, I wanted to send this back because it will not fit my 35mm bar unless I removed both rubber pads. Doing that exposes a rivet that gouges your bars. I was told I would have to get an RMA to return this. To skip the hassle, I gave it to my son who has a 31.8mm bars and this fits fine on his bike. So we did our first night ride and Turbo would only stay on for 20 minutes. Then it would reduce. You could turn it back up only to reduce again. I tested this at home with fresh battery and got more of the same. So just get used to your light dimming to less than half it's output in the middle of a ride with now warning. Last, its kinda heavy for what it is. It's acceptable weight for a 1200 lumen 2 hour light, but it's only reliable as a 400 lumen light. As a 400 lumen light, it's too heavy. I like Fenix products and I use their batteries exclusively in my other lights. I think they make some awesome products, but this light was a real disappointment.

Hi Erik - Sorry to hear you are disappointed in this light. Yes, we do require an RMA to return a product, which is a simple procedure with our warranty team. A quick phone call or email to warranty and they get you in the system and email the RMA info to you. That way we know what's coming in, and why.

As for the runtime on Turbo, it will drop down in lumens, per the runtime chart, to protect the light from overheating.

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