Sinewave Cycles Revolution USB Dynamo Powered Charging Device

I recommend this product

Great piece of kit, far lighter than a battery pack and keeps battery well topped up whilst using a map app. Well worth the investment

I recommend this product

Fitted this to my touring bike running off a SON hub dynamo and used it last week on the Rebellion Way in Norfolk to power a iPhone SE running Kamoot without a cache battery.

It's a neat and very well made, rugged unit. At road touring speeds it was well able to keep the iphone charged even when displaying the turn by turn instructions and map display. Less so on the off-road or stop/go city centre stretches.

On the more flowing stretches it could significantly charge a sleeping iphone back to 90 % in a couple of hours.

Interesting to see improvements with new version of SON dynahub when released.

I recommend this product

Lots of good reviews here. It is a great thing!

I recommend this product

I totally misunderstood/underestimated this tiny little box of tricks. It comes with installation instructions but not usage instructionsy. I installed it piggyback to a SON Delux shared with a SON Edelux II (with SON rack mount rear light). From initial tests with the SON lights off I am getting approximately 5% of charge for every 10km on both a Garmin Edge 1030 and an iPhone 7 (one at a time of course) on the open road. In town (central London) I am getting approximately 5% for every 20km. Impressive. Highly recommended.

I recommend this product

Didn't know how good i had it til I sold it. Best usb port on market. Sold it for an igaro d1 but that's not water resistant and yes it'll charge 2 gadgets but at big weight penalty a messier frame etc..this is ridiculously light and waterproof..the circuitry inside is waterproofed glue gun or similar so no worries about water ingress still avoid submerging..

Yes it won't charge any device quickly on its own. No bicycle usb port does because its 6v operation vs Wall charge. You must with all usb ports charge your phone via a power bank and pass through charge if it does or charge just a power bank if it doesn't pass through then your gadgets.

Those that pass through charge speed up process massively even when power bank is dead within seconds to a minute of charging off this there is no worry with phone plugged in that it will run out of power and stop sending power to a device. I'd rely on this in the middle of nowhere

I recommend this product

I previously had a USB Werks that lasted 6 years run off a Shimano N72 dymamo. I think the battery of the USB werks just gave up so I was intrigued how far tech had come to do without a cash battery.
As all these chargers seem incredibly expensive for what they are I looked into them quite carefully and really got into all the graphs etc. I chose this because it can be mounted in loads of positions and doesn't interfere with a quad lock mounted phone on the stem. I have an iPhone SE and it works really well. Not having a cash battery I was concerned the phone would lock out if you cycled below the min charging speed when cycling up a steep hill. It doesn't but picks up when you reach speed again. Also I have found it charges at 7mph while using Viewranger or Komoot on full screen and listening through bluetooth earplugs and with 4g on as well. It even charges the phone when the lights are on (B&M Cyo IQ) but probably slower.

I recommend this product

Ran this off my AXA traction HR bottle dynamo. Works perfectly. Charged my Garmin edge 1030 from 44 to 79% on a two hour, 20 mile ride with my Garmin switched on all the time. Advantage of bottle dynamo is you can take it off the tyre when going uphill. Simple maths shows that it works equally off bottle vs hub dynamo which generally have same power output of 0.5 amp.

I recommend this product

When I use gps apps on my iphone the battery gets run down quickly. This is a great product for preventing battery drain. It is simple to set up and use. However, this device does not fully charge my iphone but just it keeps it from getting completely run down.

I recommend this product

The best in the lot that is available for sale.
Charges good and without any damage to phone.

I recommend this product

After an a disappointing experience with a similar product by another brand that lasted 5 days I was recommended this by SJS. Its been faultless and I cant recommend it more highly! I recently used it on the London-Edinburgh-London 1400km Audax, it kept my iphone running RWGPS and my Garmin 500 charged for the entire ride. I had no issues running them directly off the device with no need for a cache battery. It worked in all weather conditions and was left out in the rain at night on several occasions and worked fine the next day. The build quality is very good and it can rotate on the mount which can be useful for moving it for different length USB cables or just ease of access.

I recommend this product

Only taken this on a brief test ride so far but the results are great. Super easy to fit and the unit is small enough to tuck in a frame bag, or be stealthily mounted on the outside of your frame. Will be an essential piece of my touring kit going forward.