I bought 2 USB 3.0 cables from some guy that posted here (his site was questionable, but I got mine) for under $20 IIRC. Any micro USB cable will work for charging the device and I am generally near a computer so the only thing I'd like to have access to is a USB 3.0 cable. Otherwise, needing a backup charger is no big deal for me. I've used everything from Motorola USB cables to HTC cables. While they don't all charge at the same rate, they all provide a charge.