14.10: Battery indicator stuck on 64%

Try the following:

upower --enumerate 

...and detect the battery canonical name. After that, you can issue:

upower -i /org/freedesktop/UPower/devices/battery_BAT0

(change with your name). This will give you the full statistics of the battery. If it's old, you can have a maximum capacity different form 100%:

energy-full:            44.69 Wh
energy-full-design:     47.52 Wh 

...and that means that the battery is "old" and had lost (in my case about a 10%) part of its capacity. If the battery is three-four years old, losing a 35% could be a normal thing.

EDIT: Given the new data on the question, this seems a bug of the power indicator; it is averaging the battery of your bluetooth and the main one. You can check http://bugs.launchpad.net/ubuntu/+source/indicator-power to see if you find it, or posting a new one; but it is probably related to https://bugs.launchpad.net/ubuntu/+source/indicator-power/+bug/850728.

I have a similar laptop (N56VJ) and have the same problem. Here is how I fix it:

1. Turn off computer;
2. Remove power adapter;
3. Remove battery;
4. Wait one minute;
5. Plug everything back in.

I'm not sure why it happens, but my guess goes to some problem with ACPI management done by Linux kernel. It does not happen with Windows.