Portable Solar Powered 4000mAh Battery w/ Charging Adapters

Pros: That is the thing I was dream. :) Others similar things that I used and seen in DX shop don't have enough power solar to charge PDA and very low battery (less 4000mA).
So you can charge your gadget via light or built-in battery. The battery charges from USB.
This one works good with my Galaxy S2 and built good quality.

Cons: Instruction only on chinese. Some of functions are not easy to understand but when you start use it - you will get it by yourself

Other: I'm really happy with this device, I tried many of them - this one is perfect!
Comes in good smart box - you can buy it as a present.

Pros: Mobile charging anywhere in an easy to use device with several adapters. The several adapters were a little daunting, but once you find the ones you use on a daily basis the others can be stored in a high quality magnetic box.

Cons: Only Chinese instructions and it doesn't include EVERY possible outlet. Other than that nothing really too bad.

Other: Excellent product that I will be using repeatedly to charge whatever I want on bike rides.

Pros: Light despite the high battery capacity. Aluminium casing feels strong. It appears that short-circuiting is not problematic for this cell. I've tried many other cells before that would short-circuit while charging my device (Nokia connector that usually comes with these does not fit well on a Nokia 5800). When that happened I'd need to hook the cell up to a 230V power source. Looks like this one just turns off when something goes wrong, turn it on and it's back. This is the main reason I'm so happy with this cell. Charges relatively quickly. Cell battery takes ~2 days in the Australian sun to fully charge, i.e. I can easily get one full phone charge per day.

Cons: Does not come with a carrying bag, box is too bulky to use for transport. USB connectors are not particularly universal, e.g. no proper connector for a Nokia 5800 Only comes with Chinese manual

Other: Excellent product, if you need a proper solar cell with battery included you can quality wise play it safe and go for this one.

Pros: Gives a lot of juice for its size. I could charge a single small phone from dead to full in a few hours, and there was juice left in it to keep another, more powerful phone from shutting down. Feels sturdy and well-built. Can charge an iPad from 0 to 40% in 3 hours. Not full, but hey, current is supposed to be limited at 1A, not the 2A the wall charger gives it.

Cons: Solar panel really isn't charging much. Seems more like a gadget than a real feature. Even in full sunshine for hours during summer, I couldn't get more than one LED worth of battery level to light in a day. Shipped cable has flimsy connections. Better use the original USB cables from your devices.

Other: This is a good backup battery when you tend to forget to charge all your devices before leaving.