im looking to buy a backup battery pack( the external portable battery)
not sure what the proper name for it
is there a battery pack that can last me 5-7 hours of continuous use ( for example on an airplane or camping) watching movies etc
i saw some at the airport on best buy vending machine but they were kinda expensive
so is there one with solar panel
and if there is one what is the best band for the buck
capacity. solar charging speed etc
somewhere in 60-150 dollar rance maybe?