Astak EZReader 5" Pocket Pro
Battery Life : 8000 pages or around there
DRM Formats : Yea they're there, but there's no lockdown like in the case of Amazon, Sony or any of the other biggies. They're just additions to many formats like RTF,DOC,TXT,HTML,PDF(reflow),EPUB. The support for LIT and CHM is spotty at best and you'd best avoid them on the PocketPro. Then again, other than Pocketbook, chm support sucks across most readers in the market now.
Price : $199