Symptoms
- Battery percentage drops noticeably even when idle
- Battery lasts much shorter than when new
- Gets warm while charging or in use
- Battery estimate jumps around unpredictably
Likely causes
- CommonScreen brightness set highThe display is typically the biggest single power draw.
- CommonBackground apps or tabs staying activeVideo calls, streaming tabs, and Android apps can keep draining power even when minimized.
- PossibleBattery has aged and lost capacityLithium batteries naturally hold less charge after roughly 2–4 years of daily use.
- PossibleKeyboard backlight or Bluetooth left on unnecessarilySmall features add up when left on constantly.
What to do
- Lower screen brightness and turn off keyboard backlighting if you don't need it.
- Close tabs playing video or audio in the background, and check chrome://settings/content for autoplay.
- Turn off Bluetooth and any unused Android apps running in the background.
- Check battery health estimates if your model supports it, or note how much shorter runtime is compared to when new.
- Update ChromeOS in Settings > About ChromeOS, since power management improvements ship in updates.
- If the battery drains fast even when the lid is closed (sleep), check for apps preventing sleep in Settings > Power.
Tools and parts
Replacement Chromebook batterySearch: “Chromebook internal battery replacement [model]”
When to call a pro
If the battery is old and drains rapidly even after settings changes, a repair shop can replace the internal battery.
Safety
Use caution
If the battery is visibly swollen or the case bulges, stop using it immediately and have it replaced by a professional; do not puncture or continue charging a swollen battery.