Bought a slim MPJ 3200mAh battery for my S3 several months ago. A little improvement but basically on par with the stock, so I just paid nigh on 37 bucks for a I717 7000mAh battery+ TPU Gel extended battery cover. Gonna post result later.
Very interested, let me know. Good to see people still rocking the original Note, nothing on the market of new phones is impressive enough to warrant me spending money on them when this phone still has life enough to be my daily driver