Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Why buy this? Better options are out there.

Why would anyone get this type of charger? For about $40, you can get an "isupercharger" that you can plug into the wall, plug into a car lighter, plug into a USB port, or run off of a 9 volt battery. With the 9 volt battery option, you can use your iPod all you want, even on a long airplane flight or when you are camping. It's a small, all-in-one design. I don't want to carry a bunch of different adapters with me when I take my iPod along.