I'm trying to figure out exactly what this item is. Battery Desktop Charger For Sprint HTC Touch Pro 2 Pro2 - eBay (item 280506247151 end time Jun-11-10 19:18:47 PDT) I can use this to charge an extra battery while it's not in the phone? Can I then also plug in the USB cable and charge my phone at the same time? Anyone bought this one or can suggest a similar/better one? I'd love to have my extra battery always charged and available and it would be nice to use that wall connection to charge my phone too.