Sometimes one post (P1) is commented "possible duplicate of P2". P2 itself is commented "possible duplicate of P3". Example:
http://askubuntu.com/questions/246610/how-to-increase-battery-duration-hybrid-graphics-notebook
is pointed to
Battery drain on ubuntu is fast,
which is a possible duplicate of
Tips to extend battery life for laptops and notebooks.

What can/should we do to improve the situation?