50 cc methanol gives average cellphone 2 charge in seconds, http://www.toshiba.com/taec/news/pre...fc_09_580.jsp; http://www.pcworld.com/article/17411...l_charger.html microUSB approved as future universal cellphone charger, http://www.msnbc.msn.com/id/33448863...ch_and_gadgets Bring a bottle of methanol during hiking or camping will give unlimited supply of energy, if one can afford the $328 charger , a little bit more than half of a N900 bun