Sorry for a bit of necro-posting, but this is coming up as a prominent post so I figured I'd respond.
I just recently got a great price on a new battery for my Photon. I don't know where this company ships, so you'll have to look into that yourselves (or whomever else reads this).
(Bah.. I have too few posts, so this is not allowing me to post external links. The site is www .a4c. com (without spaces) and you can go search for "Motorola HF5X battery" to bring up the couple products I saw)
At the time of this posting, they had the battery for $2.95 each, as well as an option to get a wall charger and battery for $4.95. Great prices and delivery/service was excellent.
To be clear, the battery is "HF5X" model.