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Ullmann Power Station V4 USB Dynamo Powered Charging Device

£99.99 Please note this product has selling restrictions to your country. was
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SJS Cycles part number : 
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Questions & Answers (4) Q & A
Perfect for cycle touring. With the Power-Station V4 you can supply your USB-Device with electricity from your hub dynamo during the ride. Perfect for smartphones, GPS, buffer batterries, MP3-players, battery chargers and more. . .
The inconspicuous Power-Station V4 is supplied with a twin core wire cable with 2 Schmidt compatible piggyback connectors at one end and a barrel plug at the other and a 30cm micro USB cable. The piggyback connectors fit the Schmidt‘s Original Nabendynamo (SON), but the Power-Station V4 can be used with other hub dynamos as well by cutting off the connectors and replacing them with your own. It has no mechanical switches nor potentiometer. The Power-Station V4 has an output of up to 5V DC.power according to the USB Battery Charging Specification of your own device The actual cycling speed in order to provide 5V output, depends on the individual characteristics of your mobile device, your hub dynamo and your wheel size.Please check with your device’s manufacturer for compatibility/requirements.Weight: app. 19 grams w/o wires. The Power-Station V4 has been extensively tested in real life situations and in different climates. Heikki Siivari, the Finnish extreme cyclist and ultra-light backpacker, used it on his long distance rides 2013, 2014, 2015 and 2016. During these rides he was completely independent of mains electricity. Designed in Finland, developed in Finland, handmade in Finland, tested throughout Europe.
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Questions & Answers (4)
Where the dynamo is mounted
07 Sep 2018
is there more detailed user guide / manual available for this? I'm keen to understand as where the dynamo is mounted (front/rear wheel) and how the cable goes from dynamo to charging unit? Lastly can it charge iPhone and usb light together? Thanks, P
Hi, as far as we know there is no detailed guide, it is designed to work with a front hub dynamo. The cables run up the fork leg. It charges one USB device at a time. Thanks
Where and how would this be mounted?
19 Jul 2018
Hi there,

As there is no mounting points it can be mounted anywhere. Things like this are normally mounted around the handlebar area as this would be where people would have devices that need charging. In terms of mounting it your best bet is to cable tie it to your bike somewhere.

Apologies, could you be a bit clearer about the size?
04 Aug 2017
Is the 22mm a diameter? For example, would the product fit within a 27.2 id seatpost? Thanks
Hi, yes 22mm is the diameter (it's not a perfect circle so widest point). Yes it would fit inside a 27.2mm tube. Thanks
What Size Is The Ullmann Power Supply Device. I Take It Will Work With An Sp Hub Also
15 May 2017

I'm assuming by size you mean the actual dimensions of the device which are 50mm x 22mm. You will need to change the connectors but otherwise will be fine for use with an SP hub.