KeyRoutines
TriggerFreetrigger.power.battery

Run a routine when your laptop battery gets low

Battery low starts a routine when your laptop's battery drops below the percentage you set while it is running on battery. Use it to save power or save your work in time.

How it works

  • Set the level, from 1 to 100 percent.
  • It fires once per drop, and arms again once the level is back at or above your number or the charger is connected.
  • If the battery is already below the level when the trigger is switched on, it waits for the next drop instead of firing straight away.
  • The routine receives the battery percentage and whether the PC is on AC power.

Routines that use it

Stretch the last 20%

At 20%, Set power mode to best power efficiency and Set brightness to 40%.

Save before it dies

At 7%, Hibernate with a one-minute countdown so your apps survive.

Charge reminder

At 15%, Speak text says "Plug in the charger" in case you missed the Windows warning.

Settings

SettingWhat it does
BelowFire when the battery drops below this level while on battery.

Good to know

  • Only useful on PCs with a battery, and only while running on it.

Questions

Can Windows run something automatically when the battery is low?
Windows only offers its own fixed low-battery actions. Battery low lets you run any routine at the level you choose.
Will it keep firing as the battery keeps dropping?
No, it fires once per drop below your level. It arms again after charging back up to that level.

Pairs well with

Condition · SystemFree

Battery level

Battery level passes when your battery is at least the percentage you choose. Routines use it to skip or delay power-hungry steps when the laptop is running low.

Trigger · SystemFree

Plugged in or unplugged

Plugged in or unplugged starts a routine when the charger is connected, removed, or either. It's the trigger for laptops that should behave differently at the desk and on the go.

Step · SystemFree

Hibernate

Hibernate saves everything to disk and powers the PC down, so it uses no power but comes back with your apps where you left them. People put it at the end of an evening routine or after a long download.

Step · SystemFree

Set power mode

Set power mode changes the Windows 11 power mode you find under Settings, System, Power: best power efficiency, balanced or best performance. Gamers flip it to performance for a session and back afterwards.

Step · DisplayFree

Set brightness

Set brightness changes how bright a screen is, from 0 to 100. It works with laptop and tablet panels and with external monitors that accept brightness commands, so you can dim everything at night or brighten up for daytime work.

Build this routine in KeyRoutines

Free from the Microsoft Store for Windows 11 and 10. Pro is a one-time upgrade.

Get KeyRoutines freeFree vs Pro