Dynamo hubs

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skinny in reply to @fussballclub

I'm not sure if the exposure can be charged from a dynamo but yes.

I'd also suggest using a cache battery then charging from cache battery so any power spikes don't mess the internal batteries up.

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fussballclub in reply to @skinny

So I run the Sinewave in a battery pack http://www.amazon.co.uk/TeckNet®-External-Lightning-Sensation-Blackberry-black/dp/B000UH46YY and the Garmin and Exposure from this battery? The Exposure charges from USB mains, will test charging it from the 3700mAh Portapow.

How long to charge a 7000mAh battery pack with your setup?

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skinny in reply to @fussballclub

At a rough guess I'd say it charges around 1000 ma/h. Given it takes about 1h30 to charge my iPhone. But that's a guess.
And you wouldn't need a big 7000 pack. Just get something smaller.

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