As they say, it’s hard to please all. Except solar powered charger, we must introduce the normal portable battery charger such as the following one.
Obviously this portable charger comes from a China-based manufacturer. It measures 95 x 82 x 23 mm, and comes with a 17,600mAh lithium rechargeable battery. Undoubtedly the portable charger have the biggest battery capacity at Gadgetsin at present. The second is a solar charger backpack. Moreover, the portable charger ships with six laptop adapters that allow you to charge various branded laptops such as Sony, Acer, IBM, Lenovo, Dell, and etc. And via the USB ports, you can charge the cell phone, MP3 player, ebook reader, and many other devices with USB ports.
The portable battery charger is priced at $57.39 USD. If you want one, you can purchase it or get more details from Chinavasion.
Portable Battery Charger for Your laptops and USB devices Source