I bought the iGo charger to be able to charge my cell phone in the car while on trips. What I was not aware of was that this car charger required a tip, which I also would need to purchase to be able to be compatible with my phone. I wish it had been more clear about this and provided a place to maybe purchase this tip. I have search and only found this tip in radio shack. It cost about as much as I paid for the iGo Charger. So Be careful in what you buy and make sure it is what you want.