I've created a free and tiny system tray app that solves a problem that's been bugging me for a while with my Windows 7 laptop. Whenever the battery was low, regardless of the power settings I would never be warned, and it would instead suspend or hibernate suddenly. From some brief research on the net it seems I'm not alone with this problem and the general consensus is that it's a Microsoft bug in Windows.
As a result 'Battery Notifier' will repeatedly show a balloon popup notification from the system tray when your laptop is on battery power and it reaches 20% or below.
Download Battery Notifier Here
Note - please extract all files from the zip before running setup.exe.