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A review of PedalCell, an impressive new rim dynamo

I just finished testing of the PedalCell, a new rim dynamo that is designed to charge USB devices while you ride. I was impressed by how much charge it delivered. If you tour with USB-chargeable devices, this dynamo will keep them in electricity without requiring you to plug them into wall outlets.

I written up my findings in a detailed review of the device for those who want more information, including photos and numbers.

Here is a quick summary: Every time I rode with the PedalCell, my iPhone ended up with more power at the end of the ride than when I started, no matter what apps I ran on it or how long I rode. My estimate is that it added 20% charge to my new iPhone 12 per hour of riding.
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