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WU_E_LOW_BATTERY
WU_E_LOW_BATTERY is a Windows Update Agent power-state decision. The installation was not started because available battery power was considered insufficient for the update operation. The error code does not publish a universal percentage threshold, so software should not invent a fixed value such as 20 percent and present it as the WUA contract.
What to verify before retrying
- Connect the device to AC power and confirm that Windows reports an active charging source.
- Run a fresh update operation after the power state changes instead of repeatedly retrying the same failing installer call.
- For fleet tooling, record AC/DC state and the WUA HRESULT separately from generic battery telemetry.
Compare the related success status
WU_S_SOME_UPDATES_SKIPPED_ON_BATTERY means an operation completed while some updates were skipped because the device was on battery power. WU_E_LOW_BATTERY is an error for an update that could not be installed under the current power condition. Per-update results are useful when a batch contains items with different power handling.
References
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