Default cheap Dock Stand & Battery Charging station?

Does someone know which is the best and cheap Dock Stand Battery Charging station?
many of them looks good but we have to think how fast they can charge the second battery or the phone
i think most of them is 500mA for the phone and 500mA for the battery
Do we know a faster even only for a battery ?
http://www.ebay.com/itm/321166786295...84.m1436.l2649
http://www.ebay.com/itm/330738453602...84.m1436.l2649
http://www.ebay.com/itm/310725028038...84.m1436.l2649
http://www.ebay.com/itm/USB-SYNC-Doc...item3380965b72