I use this one for 30eur to power my dell xps when watching movies and charge 2-3 phones over night: http://budgetlightforum.com/node/62740 http://budgetlightfo

I use this one for 30eur to power my dell xps when watching movies and charge 2-3 phones over night: http://budgetlightforum.com/node/62740 http://budgetlightforum.com/node/62740 it's cheap super portable considering it charges all my devices at once and if you don't need to charge fast on all ports at once it's totally fine. edit: amazon reviews look like you have to get lucky to get one that doesn't blow up... mine works absolutely fine since 6 month though.