The Cells were standard 2600 mA NiMh cells which had been sitting in the back of a cupboard for the last 6 months as they had essentially been replaced in use by Eneloops. I ensured that they were completely dead by testing them in a Minimag with a Nitze 3 LED type bulb replacement and a Fenix L2D. The cells gave out nothing in both flashlights.

After about 15 minutes charging I would expect around 1.5-2.5 hrs use with a Garmin Etrex Camo.
If used with a Cell phone this will depend on the cell phone type and its power requirements. A typical cell phone will typically have a 1000mA/hr 3.7V Lithium Cell or about 3.7 W/hrs. A 15 min charge typically generates about 1-1.5 W/hrs cell energy so the cell would be about 1/4 to 1/3 fully charged. From this I would expect at least 20-40 minutes talk time. Certainly enough to make an emergency call.

I would have to say that the performance specifications at http://www.freeplayenergy.com/product/freecharge12v/specifications don't seem to be particularly overstated.

The Cells were then put in the Fenix L2D are were capable of runnnig the Fenix L2D on Turbo mode (180 Lumen) for a good 8-10 minutes before the standard high mode (100 Lumen) was only available. Again I would expect the continous low mode (12 Lumen) to be available for more than 6-8 Hrs.

The technology does seem to work as advertised. Today I have even purchased the Freeplay Summit Radio for household use (which was available locally for £30 or about $55). A digital PLL Short Wave radio for £30 is a bargain in its own right let alone with solar PV and Freeplay direct charge alternator system. Again it has the look and feel of a durable quality product.