dynamo usb charging

Power Resource for Bicycle Touring: Dynamo Hubs, Solar Panels, Power Supplies and Batteries

Sometimes there will be no power points on your bicycle trip. Luckily, there are so many options these days to harvest our own power. This resources has been created to offer as many bicycle touring power options as possible – covering dynamo, solar, power supply and batteries.

So, what’s best for you?

Here’s how I break it down:
– My preference is to use dynamo hubs. If you have dynamo lights already, do yourself a favour and grab a power supply to start charging your devices.
– If you want to charge your laptop on the road – solar panels and batteries are your best option. Just like a laptop, panels and batteries are not lightweight or space savvy.
– Solar and/or external battery packs are great for the budget conscious.
– If you only need a small amount of extra power between destinations, an external battery is a great solution for you. Batteries come in all sizes depending on the use.

If you know of any other great, reputable products that I have missed, please leave a comment below.

Dynamo Hubs

I love powering my devices from a dynamo hub. Good quality dynamos have no noticeable resistance and coupled with a power supply will provide ample power for most gadgets you carry on a ride.

Biologic Joule 3 – This is one of the lightest and most efficient dynamo hubs on the market. The disc hub comes in a bit over 400g and is available in black or silver (32 hole only).


Sanyo – The H27 is the best value dynamo hub around. One for the super budget conscious, although if you’re going to the effort to build a new dynamo wheel, it could be worth investing a tad more money into a better performing Shimano option.

Schmidt – The industry standard for dynamo hubs and my hub of choice. Schmidt dynamos include an incredible five-year warranty and are not expected to need servicing for at least 50000km. I generally recommend the SON28 for bicycle touring as it reaches nominal power at low speeds – necessary both for charging devices and lighting your way when climbing. The SonDelux is the more efficient option, however it will require higher speeds to achieve the same power. Schmidt hubs come in different axle configurations including 15mm.

Schmidt Dynamo Hub

Shimano – The Shimano T785 (XT) dynamo hub is excellent value for money (and the hub we’d choose from the range) and is popular on complete bikes.

Shutter Precision – Excellent value lightweight dynamo hubs. Similar internals to the Supernova Infinity S but at a lower price. From all accounts SP hubs are standing the test of time. Fat bike dynamo available too!

SRAM – The D7 is good value for money, however generally only found on complete bikes.

Supernova – Supernova do two hubs; the Infinity 8 (on-off switch but heavy) and the Infinity S (no switch and lightweight). Alleykat love Supernova products and wouldn’t hesitate to use the Infinity S in the future.

Dynamo Generators

EcoXPower Hub Attachment – This is a really interesting option because the hub attachment has USB charging capability as well as front and rear light integration. Included is a remote switch to turn the lights on and off, as well as a waterproof smartphone case which mounts onto the handlebars.

Sunup Eco DSR-1 Hub Attachment – The Sunup bolts onto most existing bikes using 8-10 bolts. I’ve heard it isn’t efficient at all – I’d love for a user to verify this information.

Dynamo USB Chargers

USB chargers are an integral part of my bicycle touring kit. They connect to my dynamo hub, do some power converting and then charge all of my devices. More detail on the following power supplies can be found in my dedicated USB charger resource.

Axa Nano 50 Plus – A dynamo headlamp with USB power connectivity, these lights are really popular on European bicycles.

Biologic ReeCharge – This neat mounting product is available at a low price, although the battery capacity (1600mAh) isn’t all that large for post-ride charging.

Busch and Muller eWerkIf you want/need to adjust amps and volts to suit different devices while riding, then this is the product for you. We feel this product is expensive and the optional cache battery (also expensive) available isn’t all that powerful (1600mAh) for post ride charging.

Busch and Muller USB WerkThe USB Werk is the more recent release by Busch and Muller. It is a stripped back version of the eWerk and with a cache battery built in. The price is now very competitive with other options. If you only need to charge basic USB devices (GPS, smartphone etc), this will do all that you need!

Busch and Muller Lumotec IQ2 Luxos U Light – A new fantastic, bright dynamo headlamp with USB connectivity and a button on the handlebars for selecting whether the power should go to the light or the USB device. No external battery available for post-ride charging.

Exposure Revo Light and Boost CableThe Revo is probably the brightest dynamo light on the market. It has a port which allows you to hook up Exposure’s ‘boost’ cable and charge USB devices with it.

LightCharge USB Charger – The cheapest dynamo power supply option of them all. It can only charge devices while the bike is moving – there is no battery.

PP+ Super-i-cable – The SIC connects to a dynamo hub and can charge devices as you ride, or stores enough power (2200mAh) to charge your devices once you’ve stopped. Our review HERE.

PP+ V4i – The V4i is the extra battery to be used with the SIC. It can charge our iPhone four times with 10 hours ride time. The battery has a 6700mAh capacity. Review HERE.

Sinewave Reactor – The Reactor is a new stem power supply competitor to The Plug III. It’s advantage is a slightly lower cost and smaller stack height. As it is new, it is unknown how reliable or effective it is at this stage.

Sinewave Revolution – This particularly small and 100% waterproof charger (see the pics) can be hooked up directly to phones or power packs. According to the manufacturer a built-in battery model is in development.

Supernova The Plug III – The neatest, most elegant power supply of them all, and the one we use. The cable runs from the hub and mounts beautifully on the top of your stem cap. It is theft proof and can charge a smartphone or GPS from just 12km/h. My five-star review is HERE.

ZZing – We don’t know too much about this product, but it seems like a more cost effective alternative to the others. It packs 2700mAh in it’s battery.

Power Supplies – Bottle Dynamo

Bottle dynamos have been proven before to be more efficient at higher speeds than dynamo hubs. But with dynamo hubs getting more efficient and LED lighting dominating the market nowadays, 12-volt bottle dynamos don’t really have a place and 6-volt dynamos are only really for those on a tighter budget. If you are using a bottle dynamo, you are limited with lamp options – more here.

B&M Dymotec 6 and S12 – These are the best in the business however we think the Dymotec S12 is a bit pricey for what it is and the Dymotec 6 is a pretty basic unit.

SpinPower Charging Kit – At $80us including bottle dynamo, smartphone mounts and cables – this is one of, if not the cheapest way to charge and ride. Although the build quality doesn’t look so high…

Solar Power

Solar power technology is ever-evolving and is pretty much just getting super awesome. If we travelled with laptops we wouldn’t hesitate to get a mega solar kit and battery to keep everything running wherever we are. We actually aren’t very experienced in solar power ourselves but hear and read a lot from crew travelling around the world.

Note: There are lot and lots of solar chargers available, but these are from the larger brands with a more established reputation.

Brunton Solaris/Explorer – A bit pricier, but from all accounts some of the best products out there. If you get something with USB compatibility you’ll be on a win. Products rated between 2-26 watts.

Goal Zero Nomad – Probably the most popular solar units around for bicycle travellers because of their low cost and availability – although customer service and longevity seems less than perfect. Products rated between 7-27 watts.

Freeloader – Super cheap, small (1.5w) solar charger/batteries with 800-1600mAh built in batteries. Good for smaller USB powered devices for those on a budget.

Powerfilm USB+AA – This small 1.5w panel gets mixed reviews as it’s not as cheap as the competition and isn’t compatible with all phones.

Powertraveller – The Primatepower solar products offer a good range of solar panels from ultra compact to laptop sized. We like the Powermonkey Extreme for it’s waterproofness and 9000mAh battery and the Solarmonkey Adventurer for its compactness and ability to be strapped – although if you’re using a laptop, you’ll want something bigger.

Solar Joos Orange – Really good looking product, relatively cost-efficient. Product rated at 4 watts and has a built-in 5400mAh battery.

Solio Bolt – A small and cheap unit – haven’t heard too much about it. Product rated at 5 watts.

Supernova – Available from the makers of the brilliant dynamo lights and hubs. Product rated at 5 watts.

Voltaic – Really nice looking products available at a good price. The Fuse models have clips which allow you to attach the panel to a bag or pannier – a great design feature for bike tourers! Products are available from 4-17 watts.

Power Banks

Your travel might be short enough or you might have enough access to power to never need dynamo or solar chargers for your bike trip – batteries might just be small and light enough to keep your devices going between wall plugs. Some of these battery packs will connect directly to the above dynamo hubs or solar panels, holding saved power for when you need it most.

Note: There are lot and lots of external batteries available, but these are from the larger brands with a more established reputation. Please check for connectivity to solar panels.

Anker – Well priced products with batteries ranging in size from 2600-20000mAh.

Brunton Impel/Sustain – Super well-made products with a power capacity ranging from 2800-13000mAh. Slightly more expensive than the competitors, but they are worth it. Check out the small waterproof battery!

Energenie – Decent products available with between 1800-20000mAh juice.

Hyperjuice – Big batteries for laptop charging: 60-222Wh power, but all this comes at a cost (360-2130g weight). This is the system we would use if we needed to use a laptop in remote areas.

Innergie – A nice looking range of products for laptops and USB devices.

Just Mobile – A cheap, punchy 5200mAh option in a small casing.

Mophie – From the makers of iPhone battery cases, these products range from 4000-6000mAh and are of a great quality.

Powertraveller – A good range of external battery products for everything from phones to laptops.

PP+ SIC – Although a power supply, we’ve included this great cable in the battery section because it holds a satisfactory 2200mAh of power.

PP+ V4i – It is possible to buy the V4i without the dynamo cable, however we feel it is a bit expensive to use just as a battery. 6700mAh of power.

Scosche – The goBAT II is a nice looking 5000mAh battery that is available at a great price.

Veho Pebble – Very well priced and shiny black 5000mAh battery.

Voltaic – Neat products at a great price. 3000-16000mAh is available for USB devices. Their large laptop battery is 60Wh.

  1. Hey you two!

    A quick addition to your already very detailed list: we used a Peeble during our trip, a 5000 mAh baterry that we could charge with our E-Werk. It worked great and the battery lasted forever. For 25€, we were pretty chuffed!

    Here’s the link if you’re interested: http://www.veho-uk.com/main/shop_detail.aspx?article=124

    Hope you are well!
    Take care,

  2. Hey you two!

    A quick addition to your already very detailed list: we used a Peeble during our trip, a 5000 mAh baterry that we could charge with our E-Werk. It worked great and the battery lasted forever. For 25€, we were pretty chuffed!

    Here’s the link if you’re interested: http://www.veho-uk.com/main/shop_detail.aspx?article=124

    Hope you are well!
    Take care,

  3. Hi Dave. Thanks for letting us know about the Bright-Bike Revolution. We have added it to our resources and are impressed with the underwater pic!

  4. Hi there,

    I was just wondering what are the exact requirements of a battery for it to be able to be charged via a dynamo hub? I have got the lightcharge USB charger, however it didn’t charge my phone, in fact my phone lost charge whilst plugged into it. And I have a portable battery which I got off Amazon, but it takes an absolute age to gain any charge from the dynamo hub.
    I tested my shimano hub with a multimeter, and it was giving out 6v of AC. I then tested a USB cable attached to the lightcharge, which was attached to the hub, and it was giving out 6V of DC, so the diodes were performing their job well… So I am just wondering why I am able to gain any charge off this thing? Is their a specific battery I

    need to buy? Many thanks,


  5. The Voltaic Fuse adn V11/V30 batteries have worked very nicely on several tours. Keeping lights, iPad, iPhone and Garmin charged without difficulty. They’ve done a good job integrating chargers, batteries and the power needs of consumer electronics.

    Travel Safe,


  6. I have a Son28 and ‘The Plug’ by Tout Terrain. Will this setup charge the Brunton/ Impel or the Pedal Power Plus? Which battery storage is better? I just want to be able to charge an iPhone or Pad after pedaling all day. Thanks. Kyboman

  7. Hi Kyboman. The two batteries that you have mentioned have very large capacities. The PP+ battery is 6700mAh and can be charged directly from The Plug, however it does take 10hrs+ of ride time to fill. We normally plug it into a wall when we can, and top it up on the road. The Impel is 13000mAh and cannot be charged from a USB port, however it will charge from a wall much faster than the PP+ as a result of NOT charging via USB. If you are keen to keep your iPad topped up on the road, then a battery like the Impel will be the best way to do it – you can forget trying to charge that thing via dynamo. Regarding your phone, many of the smaller battery packs will do that fine – or you could just plug your phone straight into The Plug! Alee

  8. It depends what you’re looking to charge. The bigger the battery in your device, the bigger the battery you’ll need for your Mophie. If it’s for a phone or GPS, smaller than 6000mAh is generally fine. For tablets, I’d suggest looking at bigger batteries.

  9. In your experience, dyno hubs can charge up to 6000mAh just fine? I was reading something recently about hubs not producing enough current to charge certain batteries and wasn’t sure. Thanks!

  10. I am using Instapark Mercury 10 and EasyAcc 10,000mAh battery pack. I suggest the Instapark because it can charge directly from USB and its output is 2A which is more than enough for any smartphone or tablet. The EasyAcc is very affordable and charges super fast.

  11. Anybody know of a bottle cage mounted battery with usb output that can be charged from either a shimano dynamo hub or solar panel?

  12. You write… “Some of these battery packs will connect directly to the above dynamo hubs or solar panels, holding saved power for when you need it most.” What I’ve been looking for, and having a hard time finding, is the highest capacity battery that works with a hub Dynamo (specifically the SON28). I plan on getting The Plug III. Could you point out the batteries that do work well with dynamos? In fact, a full article on *just* batteries that are suitable would be great! So far the Smart Power Pack II is the only battery which shows variable input (flexcharge) but lacks real-world application like how many times an iPhone could be charged, and how long it takes to charge the device. I hope to write about these answers in the future, but as a consumer, I’m left having to learn a lot and still not getting the information I’d like. Which is cool! The internet doesn’t have *all* the answers.

  13. Hi Quixotique

    Actually, most batteries will be able to charge through the SON28/PlugIII combo; there’s not really any batteries that work better than others. The issue is the current, or charging speed. The Plug III is optimised around USB charging at 5V/500mA (2.5W) – it will achieve that at 12km/h. Most of the bigger batteries happily charge at lower currents (“flexcharge”), however they simply take a really long time to fill up.

    10W USB wall chargers fill up batteries around 4x faster than when you’re touring with The Plug III. To give you an idea on charging speeds, a 12000mAh battery takes 9-10 hours to fill up from a wall charger… that’s 40 hours of cycling! I normally charge my 6700mAh battery from the wall first, then use my dynamo to keep topping it up; it’s a great system. Unless you’re looking to charge a tablet (12000mAh will charge an iPad Air only once) you probably don’t need any more battery than this.

    FYI – an iPhone 5S charge uses around 2000mAh battery, so the Smart Power Pack II would charge a phone 1.5 times.


  14. Hi great article and site, I am new to touring and am planning a big trip this March from Portsmouth to Alicante using a lot of your advice tips and tricks, as I am going to be wild camping as much as possible power is an issue so I took your advice and bought a son28 and tout terrain the plug, however I have not been able to find a power pack that will charge from the plug? It also needs to be powerful enough to charge an exposure 1200 lumen front light – any ideas please?

  15. Come on Alee! Time to update this article. I NEED a solar panel to charge 2 kilowatt batteries. What’s up with the SunCapture 300w solar panel that HPC hocks for $2500? Help me unplug, I can’t afford to make a mistake.

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