Not sure how new this product is, but I haven't seen anyone post about it yet. Here's the manufacturer's page: HTC EVO 4G 2nd Battery cradle Here's the eBay page that sells it for $20 shipped: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=140463895263 or http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=140478601582 EDIT: can't get the links to work right because it adds "amp;" after the "&" in the URL. They've already sold over 100 of these, so I'm surprised I haven't seen a thread about it yet. I just ordered mine yesterday, and it shipped today with a USPS tracking number. I like the idea of a second battery charging on my dock, and I don't need the HDMI out that the OEM dock has.