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Outdoor 20W Manual Hand Generator DIY USB Electric Dynamo Power Emergency Phone Charger
US$51.99 US$62.99

Q: how many times do I need to use the crank per minute to keep voltage stable? (for example: push crank 1 time per minute is enough to keep voltage 5 volt.)

Asked by feetjai on 2017-11-20 16:51:56

yespinky around 60, it didn't seem too fast, the cranking was easy, and both USB devices I tested did not waiver

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