Knog Boomer USB Rear LED Light
|Price:||£27.59 FREE UK delivery.|
|You Save:||£4.91 (15%)|
- Water Resistant Waterproof Flexible Body
- Integrated Lens and Housing
- 2-year warranty
- Rechargeable Lithium-Ion polymer battery
- Plugs into any USB port or charger
- Recharge time 2-4 hours
- Fits onto seatpost
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Visible up to 600 metres, this super-bright high powered LED has an output of 5 lumens and a burn time of 3.5 hrs (steady), or up to 23 hrs (flashing). It has 4 modes: constant, strobe flash, fast flash, and random strobe. The water-proof flexible silicone body is super slim, has an integrated clipping feature and features quick release mounting. There is also a low battery indicator.
The battery discharge feature has been integrated into the electronics to optimise battery longevity. This feature should be activated when the light will not be used for an extended period (i.e. more than a month). To activate mode simply hold down power button for 5 seconds after a full charge cycle. The LED will be active until the battery reaches the correct discharge level to which the LED will turn off and the unit will be safe for storage.
To preserve the condition of the Lithium battery, when the Boomer isn't used for an extended period, the batteries should rest at 50% charge. To achieve this, simply charge the Boomer to 100%, hold down the button for 5 seconds. This will turn the light on and automatically shut the Boomer off when the battery reaches 50% charge.
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Top Customer Reviews
However, the light seems to be less secure because the silicon outer case looks like it may easily to come off. The front Knog Boomer light appears to be more secure than the back one. I have found a solution in that I have tied a thin ribbon on the silicon casing to tie it to the seat post to prevent the light from coming away from the bicycle frame and it looks quite secure!
The back light toggles though 6 flash patterns (needlessly) so you spend half your life turning it off.
Every minute if use requires ten minutes of charge on the PC.
I lost the back one as it fell off.
Having said that, I still used them. albeit with mixed emotions.
Useful for going to work because you can charge them there
Charge holds well, at least when used on blink
Slick idea and concept
Rear has fussy fitting of band due to hook used
Won't fit larger posts/bars without stressing the pull round silicon band
Really aNnoying lack of straight off/on option.
Would I by them again, I would have to think seriously about it. Nt sure whether the price to value box is tickable on these. Maybe time will tell. Especially if the silicon cases hold up to the weather and constant use. I have my doubts at this stage, but don't wish to be too harsh about them.
it's not as easy and seems less secure than the front knog.
The blinder system seems a bit better.
Ended up buying that Knog one, even though it is expensive (£25 for one bike light!).
Worked very well when I received it, for about a week using it everyday. Then it ran out of battery, as expected.
Since then, it doesn't work anymore!! (despite trying to charge it obviously).
Of course the return deadline is now passed so I ended up spending £25 on a light I was able to use for 1 week only=not happy!
Most Recent Customer Reviews
Riding around Cambridge is easy and can see and be seen.
Recharging is a doodle as I charge whilst i'm asleep.
It may be just my bike but the rear light attachment was loose and it kept falling off, eventually until I lost it - around 2-3 weeks after purchasing, so a complete loss really. Read morePublished on 24 July 2013 by Alison O'Reilly
Very bright, easy to attach/detach, will save me a fortune in batteries. Arrived very promptly. Very happy with my purchase.Published on 9 May 2013 by Aimi
I bought the light for the front as well and it works perfectly. However, when this one arrived it did not turn on nor hold its charge when I charged it through the USB. Read morePublished on 6 May 2013 by M. Douglass
Really bright light, works well, love the USB charge (I can use my phone charger when I'm away from a PC).
amazing lighst for the price -been using Knogg for a few years now -the blinders are even more impressive.
Bargain and very very bright and rechargable!