The HTC Desire uses a USB cable for charging and docking. It's a Micro USB connection, similar, but different to a Mini USB connection. Prices for cables such as these vary widely, from $10 to $50. I purchased my extra cable for $9.95 from Jaycar Electronics [CAT. NO. WC7724] - if you have a need for white, that's also available for $14.95 [CAT. NO. WC7796]