Battery meter always show 100% and Phone dies after 1-2 hours

Hi,

I have just purchased Samsung Galaxy Note 3 N9005 in used condition. I have 2 major problems in the phone and I am very frustrated.

1- The moment I purchased it the battery meter shows 100% and phone gets shut down after a-2 hours time. Then it tries to keep on restart but each time the when first screen with Phone name appears, the phone gets off and the same process repeat again and again. Then I have to plug-in charger, do some charging and Turn-On the phone.

2- Second problem is with Camera, the image quality is too bad. It is too blurry and whitish. Most of the time it does not Auto Focus also. There looks like some white dust inside the lens also. Front Camera quality is also not good :(

Plssssssssssssssssssss if anyone figure out how to fix these problems and what should I do :(

Thanks.

6 hours wasted so far, how do I get CWM onto the SD card and boot into it?

I've been reading forums, blogs, etc for nearly 6 hours now trying to get this to work.
What I have: Nook HD+ with 32GB internal storage and I have a 32GB microSD card.
What I want: To get rid (if possible) of the stock Nook operating system entirely because sometimes it boots to it and it's very annoying.
Was trying to follow instructions here: http://www.xaprb.com/blog/2015/01/19...d-nook-hdplus/
But having zero luck getting CWM working. First of all, which CWM and I supposed to use? There's so many versions and files floating around out there.
What should the partition be on my SD card? Should there be more than one partition? I've done this before with cell phones and never had any trouble, but I've wasted nearly a day trying to do this.
Every time I boot, it goes to the stock Nook crap.....At a loss for what to do. Please advise..