Phone charging while cycling

Hi, I am planning a bike tour and wondered how people manage with keeping a mobile phone charged while cycling. Charging up overnight wont be a problem as I'll be B&B'ing, but during the day with the sat nav and map my ride app running it wont last the day.
Does anyone use the new type dynamo devices such as http://sivacycle.com/ or comparables - any thoughts on value? Do they add noticeable resistance?
Appreciate any suggestions or advice.
Does anyone use the new type dynamo devices such as http://sivacycle.com/ or comparables - any thoughts on value? Do they add noticeable resistance?
Appreciate any suggestions or advice.
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Posts
Have used one of these in the past. Once a ride goes over 10-12 hours of mapping even an Edge battery gives up. Tend to use Anker ones myself. In the Jersey pocket with a 1m cable means you can charge on the move.
Plan your route in advance and put onto a Garmin Edge 500 as a breadcrumb trail, using your phone map only if you go wrong somewhere- that battery on the Edge 500 will last well over 12 hours of riding.
Seems to have worked for the past millennia or so.
De Sisti wrote:
This is one of the silliest threads I've come across.
Recognition at last Matthew, well done!, a justified honour
This is the size of a credit card and requires no external cable. Fits ace into a jersey pocket while riding.
Very helpful feedback and a happy new year to you all.
http://www.amazon.co.uk/RAVPower-Portable-13400mAh-External-Technology/dp/B015CMTR0E/ref=sr_1_1?ie=UTF8&qid=1451669732&sr=8-1-spons&keywords=battery+charger&psc=1
It's the size of a smart phone (a little heavier) and can charge a phone/tablet about 7 times over. It has been a brilliant purchase for use on all day excursions