How to check if your notebook can run at full speed without laptop battery

Step-by-step instruction for check Windows 7 notebook could run at full speed without laptop battery. The steps required for older operating systems are basically similar, but the details may be slightly different.

1. Startup your laptop without notebook battery.
2. Open start menu and type Power Options into the search box to open Power Options control panel.
3. Remember which power plan is currently selected (so that you can restore the setting later) and switch to Maximum Performance power plan.
4. Close Battery Power Options control panel.
5. Open start menu and type Performance Monitor into the search box and start it.
6. Performance Monitor starts up with CPU utilization (% Processor Time) graph (Figure 8).
7. Press “X” button above the graph to remove the data.
8. Press “+” button to open Add Counter dialog box.
   
9. Expand Processor Information group in the right-top list box and select % of Maximum Frequency. (Figure 9)
10. Select <All instances> in the right-bottom list box. (Figure 9)
    
11. Press Add >> button.
12. Make sure that the selected counter appears in the list box in the right and press OK button. (Figure 9)
13. See how the numbers shows with some workloads. If the number is always 100%, it means your laptop can operate at 100% performance without Acer As07a31 Laptop Battery.
14. After you are finished, repeat step 2-3 and restore the original power plan setting.