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On a Pixel 6a or later, go to Settings > Battery > Battery health > Charging optimization, turn on Use charging optimization, then choose Limit to 80%. Google lists Pixel 6a and later as supporting the setting.

Turn on the 80% charge limit

  1. Open the Settings app.
  2. Tap Battery, then Battery health.
  3. Tap Charging optimization.
  4. Turn on Use charging optimization.
  5. Select Limit to 80%.

These menu labels and steps are from Google’s Pixel battery guidance. If the option is missing, check that your phone is a Pixel 6a or later and follow the nested Battery health menu path.

Choose between the 80% limit and Adaptive Charging

Charging optimization offers two choices. Pick the one that fits how much charge you typically need each day.

Setting Charge target Best fit
Limit to 80% Limits the target to 80% Google says this is suitable if you usually finish the day with charge remaining; it prioritizes long-term battery health.
Adaptive Charging Charges to 100% For when you need a full charge. It aims to finish shortly before your usual unplug time, reducing the time the phone remains fully charged.

Google says Adaptive Charging takes about 14 days to learn your routine. A change in habits, such as travel, can affect whether it activates. These are operational descriptions from Google, not independent battery-longevity test results.

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Why a Pixel may still reach 100%

A full charge does not necessarily mean the 80% setting has stopped working. Google says the phone completes a full charge every tenth cycle so it can keep its battery-capacity readings accurate. When the screen reaches 100% during that cycle, leave the phone connected for at least 30 minutes to complete the process.

Google also describes a separate automatic battery-protection behavior on Pixel 3 and later running Android 11 or later. Under sustained charging and high-temperature or long-duration conditions, charging may be temporarily limited to about 70–80%. This automatic protection is distinct from the manually selected 80% limit.

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What the 80% setting does—and does not—guarantee

Google describes the limit as a way to help extend battery lifespan, not as a promise of a specific increase in battery life. Its published operational guidance does not quantify a longevity improvement. The setting changes the charging target; it does not ensure the phone will always stop at exactly 80%, given the full-charge cycle described above.

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