Where Can I Get A......? Kensington Power Pack question

[KitKit]

I have read the threads and still need an answer. What is the difference in the K38021 and the K33396 in plain english please. If you have one what is the best place to buy it? Online or in a store? I found one on line for 14.99 but that price is so far out of line from others I didn't get it. Thanks for the help.

 

[tribalmasters]

I think one comes with an iPod attachment but the thing itself is the same! If it turns out to be the wrong one and has less power output you can always return it and get the other or use the wrong one for charging phones and such!!

My Kensington is old now but still works for a day!