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Avast Battery Saver for Windows

Avast Battery Saver gives your laptop up to 32% more battery life by stopping energy drainers.

30-day money-back guarantee

More fuel for your digital life

We’ve all had that moment: you’re just getting to the end of that all-important document or exciting movie –– and your battery dies. Now you can get the most out of your laptop battery with Avast Battery Saver for Windows.

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Regulate PC performance

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Avast Battery Saver intelligently reduces CPU performance when you don’t need it, giving you an extra boost of battery life.
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Auto-adjust your display

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Your display is your biggest battery drainer. We make sure to adjust your brightness automatically and turn off the screen when you’re not using it.
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Turn off power-drainers

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When you’re unplugged, we’ll boost your battery by turning off Bluetooth, Wi-Fi, and your hard disk when they’re not in use.

Best of all, it works automatically

When you’re unplugged, we automatically preserve your battery.

Best of all, it works automatically

You may still be wondering...


  • Windows 10 except Mobile and IoT Core Edition (32 or 64-bit); Windows 8/8.1 except RT and Starter Edition (32 or 64-bit); Windows 7 SP1 or higher, any Edition (32 or 64-bit).
  • Windows fully compatible PC with Intel Pentium 4 / AMD Athlon 64 processor or above (must support SSE2 instructions).
  • 256 MB RAM or above.
  • 400 MB free space on the hard disk.
  • Internet connection to download, activate, and use the application.
  • Optimally standard screen resolution no less than 1024 x 600 pixels is recommended.

To block unnecessary power drains and improve your PC’s battery life, Avast Battery Saver applies the following actions:

  • Lowers processor frequency
  • Optimizes display settings
  • Disables Bluetooth and Wi-Fi (only if these functions are not in use).

To specify exactly what actions Avast Battery Saver applies to extend battery life, enable and configure the Custom profile.

NOTE:You can adjust device behavior while any profile is selected via the Bluetooth, Wi-Fi, and Brightness tiles at the bottom of the application dashboard.

Depending which Battery Saver profile is enabled, Avast Battery Saver may reduce your processor speed to extend battery life. When working with office applications or browsing the web, you should not notice a difference. If you need more performance at the cost of battery life, you can tweak the performance level in our Settings menu.

  • Custom: The effect on system performance depends on your customized settings. To adjust processor performance when the Custom profile is enabled, go to ☰ Menu ▸ Settings ▸ Custom mode ▸ Hardware and devices ▸ Processor performance. For more information about configuring your Custom profile settings, refer to the article below:
  • Maximum: This profile prioritizes maximum power savings, so you may notice a slight decrease in processor speed while it is enabled. You cannot customize the Maximum profile.

Avast Battery Saver is currently only available for PCs running Microsoft Windows 7 SP1 and higher. You cannot use the product on more than one device simultaneously, however, you can transfer your subscription from one device to another.

Yes. To transfer your subscription to another device:

  • 1. Uninstall Avast Battery Saver from the previous device.
  • 2. Install Avast Battery Saver on the new device.
  • 3. Activate Avast Battery saver on the new device.

Want to speed up your PC? Avast Cleanup can handle that. Want better graphics, sound, and external device performance? Avast Driver Updater can handle that.