They sell single chargers ( both Ipod® brand and others ) in my area for about $30 each, but they only charge one unit at a time, and all 4 of us will be wanting to recharge. I don't want to pay $120 just to charge up the players, so my next move is to try a different brand of hub. I saw a 7 port one with a slightly higher amperage yesterday ( $60! ) but if it works, it will be worth it.