You use the h621sxa300 w/ the h621sxa200 to achieve
the results given w/ the h621sxa201(hard to find)
happy hunting!
I can confirm it charges the gen 4 ipod and iphone
until apple changes it again....
Just installed, perfect!
correct part # for newer Ipods is
H621SXA201, good luck finding one
it charges a 5V instead of 12V
12v will fry your equipment