I got the combination powergorilla and Solargorilla for my birthday - as a result of trying to charge way too many things when we went camping in Switzerland this year, and I managed to both deplete it fully during a scout event this weekend, and then charge it again.

But back to basics :

(Click for larger)

The device on the left is the Powergorilla - basically a big battery with 3 connectors

- USB out for charging devices such as the iPhone

- Power out for anything from 8.4V to 24V - and supplied with a humongous number of power "tips" for charging/running anything you care to use, including almost all you need to run a MacBoon (you need Apples airline adapter in addition to the Powergorilla)

- A socket for charging the Powergorilla - either from a mains adaptor or the SolarGorilla.

The device on the right is the Solargorilla, basically 2 solar panels you can fold out, hang from a tent/branch/etc with a supplied strap, and then run a cable to the Powergorilla.

- It can also (apparently) run devices directly as long as there is enough sunlight (the same "tips" come with this device as well.

- It comes with a 2m cable, making it possibly to hang it on the outside of the tent, with the battery on the inside.

Practical use

I used my MacBook for 5 hours last night to watch movies, running it purely from the PowerGorilla (it can't charge the MacBook - just power it). And I charged the iPhone at the same time. Not bad.

Then I charged it from the SolarGorilla on a partially overcast day - to 3 out of 5 bars after 3 hours.

So I'm happy!