There are 2 types of chargers. One has 2 charging slots. The other has 4. The one that has 2 is cheaper (around $20 or so) and comes with 2 AA's. The one that has 4 charging slots can also be used in your car, if you send away for the free car cord. The newest ones have the additional AAA's as a bonus. I'm not sure, but I think the iC3 AAA's are new. Also the one that has only 2 slots is all one unit that when plugged in, it hangs on the wall. It has no cord. It's worth the extra money, I think, to get the more versitle 4 slot version.