Well my Kobo battery is finally flat!
I got about 7000 page turns - as I was reading and not counting I can't be sure of the exact number. This is a huge improvement for me since the upgrade.
I read 5 different books and started a 6th - about 2000 pages in PDF that required 3 page turns per page (I was reading in landscape) and about 500 pages in EPUB that needed 2 turns per page. I read over 3 and a bit days with a long reading session each day but on one day I had multiple reading sessions with probably at least 10 start ups after either sleep mode or a full shut down.
I got my first low battery warning at around 6500 page turns which required a shut down and restart to continue reading. I then got 2 more low battery warnings about 12 page turns later. With 3 restarts in a few minutes I was just about to give up but I wanted those couple of hundred pages that 3d0g got!! It paid off and I managed to read another 500 page turns. Enough to finish one book and start another!
Then it froze and refused to respond to anything other than being plugged in to recharge.
I LOVE MY UPGRADED KOBO