Amazon.com offers TRANS4M USB Power Source with Cables for $14.99 with free two day shipping by Amazon prime. The Accessory Power TRANS4M universal charger can charge your Android/Windows smart phone by home AC, DC car and AA or 9V batteries. Its dual USB charging ports give 1.0 Amp current for charging one device and 0.5 Amps current to each port while charging two devices from AC or DC power. This product comes with 3 year manufacturer warranty.
eReaders, iPod, iPhone 4 and 4s
Motorola: XPRT, photon, atrix, droid 3, doid X2, milestone, backflip, CLIQ 2 , XT, defy, charm and bravo
HTC: Sensation, HD7, EVO 4G - 3D, shift 4g, thunderbolt, arrive, inspire , surround, 7 pro, gratia, desire s, droid incredible 2, trophy and mozart
Samsung: Droid charge, infuse 4G, indulge, nexus S 4G, captivate, fascinate, vibrant, prevail, ace, epic 4G, alias, omnia 7, intercept, transform, moment, galaxy S 4G , II smartphones and focus
T-Mobile: Mytouch 4G, G2 and sidekick 4g
LG: revolution, thrive, thrill, octane, optimus 2X, 7, S and vortex