Interesting stuff, I live in the UK and I am thinking of building the MintyBoost with 4xAA batteries to charge up my 3G iPhone and keep it in my backpack. There have been a few times where I have hit 20% such as on train journeys and I've had to turn my phone off so I can make calls later in the day.
psylichon have you managed to get a full charge on the iPhone 3G yet from 2700mAH using either the MintyBoost or the PocketSolutions battery booster?
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