Charge Your Mobile With Water, the Powertrekk!
"On the one hand, mobile devices release us from being tethered to one place. For instance, one no longer needs to be connected to a modem to browse the web, thanks to smartphones that are Wi-Fi enabled.
On the other, such mobility is of no use if one does not have mobile facilities for charging the devices. Mobile chargers are common, but what if you were on a trek through the Amazon and the battery in your device ran out of charge?
If you are willing to pay around $300 (£200), you Read more [...]