Free battery back up software for windows

Battery Bezel is a free widget which shows battery life.
It will popup at selectable intervals, disappearing when there is nothing new to display. Customizable with hotkeys.
Battery Bezel widget allows you to view, displayed right on your desktop, info about your battery.

Ttesting tool intended to reveal the potential of a notebook battery pack Battery Eater is a testing tool intended to reveal the potential of a notebook battery pack.
Battery Eater will measure the minimum operation time of a notebook (when all power-saving options are disabled) under conditions close to the maximum workload (Classic mode).
You should be aware, though , that such conditions rarely occur during an ordinary use of a notebook and should be regarded as reflecting the minimum time the notebook can work on its battery.
Battery Eater shows a result closest to the maximum possible in the "Idle" and in the "Readers Test" mode (when all power-saving options are fully enabled).
Main features:
- Battery Eater: Advantages
- Small size of the software;
- Cost-free;
- Easy and simple to use;
- Multilanguage interface;
- Flexible testing scheme;
- Three test modes;
- You can have the program running in the background just to measure time intervals and draw the charge level graph;
- Full information about the key system components;
- Benchmarking the performance of all computers subsystems;
- Keeping track of all attached batteries in real time.

Battery Meter is a free and very simple battery meter that would suit any sort of desktop layout. Ideal for tucking away in a corner.
Battery Meter widget, displays, right on your desktop, the battery status of your PC.

Tuber Hits Back 1b is a very appealing game in which Solanars robots turned Green World into a lifeless solar battery. This planet became their military base. Tuber is on his way in his specially equipped space jet to bring this world back to life.

Enhancements: Includes unspecified updates.

Requirements:

• Windows 98/XP/2003 Server/Vista,
• OpenGL 1.5,
• DirectX 8
  

Battery Monitor is a free widget that will display the status of the monitors battery.
Main features:
- Small form factor
- Automatic Compatability mode
- Time Remaining
- Percent Remaining
- User-set warning levels
- Colors/Icons change based on percent remaining
- Beeps every 10 seconds on depleted battery
- Automatically goes topmost on low battery