I bought two of these, one works perfectly, while the other pen doesn't work at all. I tried switching the batteries, but even with new batteries, the penlights didnt work. So if you purchase the item, I hope you get a penlight that works.
I bought this b/c of the long length. Works with my iphone 4, but not Ipad. It charges the phone, but slower than other chargers, but that's because of the longer length. Overall, I would still recommend this product because of the long length, but beware you will be charging your phone for a while longer.