Need a spare iPhone Charger Cheap? Need a stocking stuffer.. get the Apple iPhone 3G/3GS USB cable for only $0.90 + FREE Shipping. Want a travel tip, when touring the NYC and your battery is about to go dead on your iPhone, take your extra charger out of your bag, find a Starbucks and recharge! I always try to remember to carry around my charger, in case the horrible red bar shows up on my phone!
Update: I have bought this, and sometimes it will say not compatible. But all I do is unplug and try again and it works!