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PDW Fenderbot Tail Light

$26 (about £23.30 at time of writing)

What price the battery lamp in the modern world of efficient hub dynamos and rechargeable lights? Portland Design Works’ Fenderbot is a powerful battery operate light with a lot to offer any cyclist, but Audax and camping tours, spring to mind, not to mention situations where carrying lights around away from the bike is a nuisance – I think of my son leaving his rechargeable lights on the bike when parking up at school. All that is true of this genre as a whole, but the Fenderbot is not the bog-standard battery light, oh no!

 

Pros: two modes, well built, reflector incorporated, long run time, even I could fit it, integrated reflector.

 

Cons: may need a bit of DIY, regular trailer haulers will find it obscured.

Spec

Requiring two AAA batteries (included!), the Fenderbot is a smartly made tail light that fixes to your mudguard, sorry, fender. The packaging comes with a template to help you drill the necessary holes, unless your mudguard has the appropriate drillings already.

 

Build quality is really impressive, with a single LED encased in a strong plastic case. A reflector is incorporated, handy for those jurisdictions where reflector requirements are enforced. Clear plastic covers the top section of the light and extends the full length of the sides, promising good side-on presence.

 

Max run time is suggested to be 200 hours. A very decent length – for me that is 200 commutes or one year’s worth (I know, part-timers). There are two modes, steady and flash.

 

Opening the casing to get at the batteries is courtesy of a small Phillips screw.

fenderbot portland design works test review tail light bicycle packaging

The unit is described as weatherproof - IPX6.

 

The light meets the FL1 standard of the American National Standards Institute. Fundamentally, this covers a range of aspects of flashlights – lumens, beam intensity, waterproofing etc.

 

The whole lot has a lifetime warranty – there are conditions.

Fixing and mounting 3.5/5

If your fender, sorry, mudguard does not have drillings already, then you will need to spring into DIY mode and get your drill out. Before getting to it, think a little about your mudguard. What is it made of? What is the most appropriate bit and drilling speed? How will you make sure the mudguard is properly supported during drilling? 

 

There’s plenty of advice about. I was using plastic mudguards, however, this SKS model has a steel strip for rigidity and strength. I also drilled an old, but much-loved plastic Kranx mudguard. For the first I used a steel bit, moderate speed, and had teed thins up with a bradawl. I decided to experiment with the Kranx guards on my Surly LHT which was to be the lights permanent home. Piercing all the way through with the bradawl, widening the holes by pushing the shaft of a punch into the hole, and then rounding them off with a small round chisel. In both cases, I tidied up the burrs produced by piercing with a file. This ensured a snugger fit.

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Measure at least twice before starting work, using the template. It is best to remove the mudguard to avoid vibration if you are drilling and either use a vice or drill against a piece of wood or some other means of support. To do any of the latter, it is easier to work from the inside of the mudguard.

bicycle fender mudguard

Simply put the light into the holes and tighten the nut until it grips firmly. Maybe a spot of Loctite will help avoid the inconvenience of getting to the nut to nip it up, but it is certainly worth a touch of lithium grease to keep the wet and muck at bay.

Switch 4/5

Located on the clear plastic top section close to the LED, blink and you’ll miss it. It is tiny, but very easy to operate, even in thick winter gloves. The good news is that you can’t stick the light in your pocket, so absolutely no danger of pocket illumination. Small as it is, you’ll be unlucky to touch it accidentally at all.

 

A single press powers up and changes mode; a press and hold will turn the light off.

Care and durability 4/5

IPX6 is nearly as good as it can get and should cater for any realistic. One might give a lick of silicone grease or such like around the joint between base and case. 

 

Fundamentally, it is waterproof in the normal run of heavy rain and road/trail spray. It has withstood driving rain in Storm Eowyn, flooded roads, and a going over with the watering can. No sign of damage.

 

It’s certainly worth a wipe round with a damp cloth every now and again, as well as checking the security of the nut. I’ve now done three hundred or so miles of mixed surface riding, and it seem to me to be rock solid.

 

Perfectly reasonably PDW tell us that they have not drop tested the light, on the basis that it is unlikely to be dropped once fixed in place.

pdw portland design works fenderbot kranx mudguard fender

Performance 3.75/5

Once mounted, the visibility all-round visibility is very good, matching several rechargeable lights recently tested in terms of side on presence. Visibility, in terms of distance from behind, is also very good, with obvious presence at around 75 metres on unlit country roads. In the bright lights of the city centre rush hour, I’d supplement it with an auxiliary light, such as the Kranx Solis 100 or the Magicshine SEEMEE 50. In suburban settings, it has held its own well against street lights and passing motor vehicles. Truth is that after initial doubts that it would live with mid-range rechargeable lights, I have been pretty impressed by this gutsy little two LED model. True, on rainy nights and in mist and fog, I’d go for a bit more outright power, say the intense Moon Helix Pro 150, or even better something like the much more expensive Ravemen TR300.

 

I’ve found the flash mode has kept motor vehicles at bay when heading through the city centre at dusk and has combined well with a steady auxiliary amidst the night-time traffic. Down the dark lanes as the city is left behind, flash does perfectly well, but I have generally dismounted and used the steady mode on its own. This seem to have proved perfectly adequate to get me seen. Equally, the reflector is very handy, too – as is wearing a reflective jacket.

Not being allowed to do DIY around the house – a situation based on a reputation for cack-handedness that I have worked hard to cultivate – my acquaintances were surprised that the Fenderbot did not drop from its position at the first moderate bump in the road. That this did not happen did not surprise me: a couple of hundred bumpy miles on and there is not a single sign of anything working loose. Even so, it is worth checking that all is holding firm every now and again, just in case.

 

Two hundred hours is a very impressive run time. Even if the Fenderbot lacks the raw power of some rechargeable price rivals, it wins hands down on run times. You can very much mount the light and forget about it. However, checking for battery corrosion is worthwhile, especially if you leave the light unused for a while or the weather is particularly damp.

 

My old Surly LHT does duty as the tractor for the trailer. I have found it necessary to use a seat-post mounted light, notably when hauling bulky garden waste to the council recycling centre – as well as a rear light on the trailer. The waste simply obscured the Fenderbot.

fenderbot bicycle tail light rear traffic
fenderbot rear  tail bicycle light dawn

Value 4/5

The Fenderbot comes in at around the price of a mid-range rechargeable. It cannot match the range of modes and has no tuneability, so comparing it to, say, the Moon Helix Pro 150, is rather unfair. It won’t match the output of a light like that either. However, a runtime of around 200 hours outstrips any rechargeable I’ve ever come across. The secure mount allows you to forget about it, once turned off: a bit like a dynamo powered rear light, except you don’t even have to turn those off.

 

The Kranx Solis 100 is an entry level rechargeable, cheaper, with surprisingly decent performance, but short run times. I also liked the Magicshine SeeMee 50 – more punch than expected at a fair price. With more modes than the Fenderbot, it has, of course, shorter run times.

 

A close comparator is the Busch and Muller 331BS. Price and promised perfomance are similar, although the B&M model only has one mode. Lezyne also produce a similar model – don’t get confused with the similar looking e.bike version. One can go a lot cheaper, but, in general, there is less power and more risk of watery ingress.

 

With very good visibility and easy care regime, its two modes and simplicity of operation, there’s a lot to like about a taillight that takes the old school battery light and pushes it that bit further.

Summary

Battery lights will not appeal to everyone, they may require installation beyond the norm, for example. However, from the angle of touring when recharging may not be an option, or lengthy night rides – maybe a long Audax – or commuting, there’s a lot to be said for them. Security rates highly, too, in the world of utility cycling. The Fenderbot, with its long run times, two modes, solid build, and comparatively strong output, makes it a very worthwhile option if battery lights are your thing. A very reasonable price, too. It’ll be adorning the LHT rear mudguard for the foreseeable future.

Verdict 4/5 Very likeable, secure, highly functional battery light.

 

https://ridepdw.com

 

Steve Dyster

 

PUBLISHED JANUARY 2025

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