the lithium batteries some of these use are actually pretty nice
i don't know about the chipsets per se but it seems like a colossal waste(http://www.autoadmit.com/thread.php?thread_id=5704893&forum_id=2Elisa#48813518)
Hobbyists use them(http://www.autoadmit.com/thread.php?thread_id=5704893&forum_id=2Elisa#48813534)