[ltp] x61s battery life time

[Damien Challet]

> I'm a bit confused... I have a X61s, with the preinstalled Windows Vista I
> get max. nearly 10 hours, normal use maybe 6 or 7 hours. With Linux (Arch)
> I get 4.5 hours, even with maximum screen brightness (haven't manages to
> get it down) and most of power savings don't work so far. Are there several
> versions of the battery? I can't understand you get so short times...

xbacklight is your friend.