inputs.text: one works iphone 3gs - reading various arguably \\bogus\\ reviews finally bought one units appear made chinese company tecyea look web whose prior model usb battery pack also works iphone 3gs make long story short ive tested imp500 battery pack indeed charges powers ipods ipod touches iphone 3gs remember use proper usb connector \\touch\\ cord doesnt work iphone 3gs 3gs cord seem downwardly compatible \\touch\\ havent attempted test true capacity unit yet prior slightly lower capacity pack indicative itll provide least couple full recharges iphonetouch son took pack long bus trip one still listening music watching videos 19hr bus ride aside friends whose ipods also able charge road daughter similar experience trip japan finally case youre wondering battery pack also charges sony psp samsung instinct usb powered devices seem less power hungry ipod touch iphone 3gs one 3400mah battery packs charge usb devices except touches iphone cant vouch long term reliability specific unit older \\tecyea\\ unit still going strong two years also note little digging around web might able find unit slightly lower price choose route sure verify comes ac charging adapter cord units seem omit important \\option\\ good luck