You’ve got your new HTC HD2 and it’s awesome! You use it all day. Only problem is that battery doesn’t last so long when you’re watching Transformers movies on repeat. You certainly don’t want to look like a sucker who has to ask the waiter at a restaurant if you can plug in your phone charger for a while. Luckily your HD2 has a user-replacable battery. Official HTC replacement batteries tend to be in the $50 range, but why spend that much for just an extra battery? Usually after a new device has been out for a while we’ll see some after-market batteries come around for cheap. Here’s one for $9 (plus shipping). Keep an eye out for more as they become available.