I've had a larger, crank-only Eton radio as part of my in-home emergency kit for a few years now. It's never let me down, so I picked up the smaller Eton FR-170 to try out and see if it should become part of my second line EDC get home bag. In addition to an AM/FM/WX radio and flashlight, the FR-170 sports an internally rechargeable battery. The internal battery can: - be fully charged in 10-12 hours via the solar panel (in direct sunlight) - be fully charged in 3-4 hours by connecting it to any USB charger (include a computer). - be charged by the hand crank, but no rating is given on how long that will take.... The real kicker for me: the FR-170 can also CHARGE any USB device, including iPhones and BlackBerrys. This is mainly why I bought it. It has a standard USB port on it, so it will work with custom cables like those on the iPhone. It has whats called "cell dump charging mode", which allows the device being charged to draw its needed amount of current. So I figure this is the perfect opportunity for some empirical research! I have already run down the internal battery by leaving the radio and LED lights on. The FR-170 is currently being recharged by an AC-USB adapter, and once it's full, I want to run some tests: - I want to see how much an iPhone can be charged, and the resulting talk/usage time. - If/how much a BlackBerry can be charged, and the resulting talk/usage time. - Repeat these tests after a solar recharge, as opposed to AC adapter recharge. - ??? What else ??? Please give me some input on what I/we should test. I will keep posting results in this thread.