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Fenix BTR20 bike light review

I've really enjoyed testing this light from It has proven it's self to be very solid and reliable as well as a marked improvement over the original BT20. Also considering its high quality build the £119.95 asking price makes this a bit of a bargain.

A few points points I've missed in my video review.

  • The battery pack houses 2 x 18650 lithium ion cells.
  • MTBR tested the light at it actually put out 875 Lumens on turbo, click the link to see their review
  • The remote switch rubber glows blue in the dark. 
  • Oring sizes for bar mounting are 
  • 30mm/35mm
  • 24mm/30mm
  • 20mm/24mm
  • The light will step down in power as the battery runs out of juice. 


  • Cree XML T6 neutral white 800 Lumen LED
  • Water resistant: IPX-6
  • Max voltage input: 12.8V
  • Headlight weight: 143g
  • Battery weight: 168g 
  • Instant Turbo with the remote pressure switch
  • BA2B rechargeable battery pack, battery switch-out system

  • Aspherical reflector with a wide beam angle 
  • 4 brightness levels and one flashing mode
  • Digitally regulated output - maintains constant brightness
  • Low power warning on the headlight
  • Quick-attach O-ring mounting straps sized for 20mm-35mm handlebars 
  • Easy, secure adjustment of the light’s direction
  • Made of aluminium alloy and quality plastic

Output And runtimes:

  • Turbo 800 Lumen / 2 Hours
  • High   400 Lumen / 4 hours 40 mins
  • Mid     200 Lumen / 10 hours
  • Low    80   Lumen / 23 Hours
  • Strobe 200 Lumen / N/A 

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