Here we have a convenient and environmentally-friendly solution: a 20,000mAh battery which can be charged through solar power and comes with 29 different adapters in the package. In order to fit our needs as much as possible, 19 out of this total are dedicated for most laptop models, whereas the 14 of them are meant for most digital products including digital cameras, mobile phones and PSP. It also comes in a compact size of 205mm x 282mm x 18mm (L x W x D).

Since charging it using solar energy can take as long as 8~10 hours, you are also given the conventional AC adapter option, in which case 3 hours would be enough for a full charge.

It is available at Chinavision for $148.