Correct - works with anything with iOS or Android, including tablets, iPods, smartphones, etc.
The rechargeable battery is not user replaceable (it's soldered on). It lasts about 9 hours of continuous use.
Austin from Mantis here. We're in a Western suburb of Chicago, so if any of you are in the area, we'd be happy to demo it for you. Or answer any questions you have here as well.
Cheers!