Why doesn’t the ASUS ux370ua battery charge when power level is above 95% with AC adapter connected?

This is a normal condition for battery protection and there is no problem with either the battery itself or the charging function.

When battery is charged up to 100% , the notebook will automatically stop charging. At this time, the battery will self-discharge very slowly owing to the chemical characteristics of a Li-on battery even though the notebook doesn’t consume any battery power.

The current design of ASUS Notebooks come with built-in RSOC (Relative State Of Charge) and the purpose is to prolong the overall lifespan of the battery.  The description below explain this phenomenon:

1.  When the battery capacity is below 95% with AC adapter connected, the battery will be charged to 100%, then stop charging.

2.  When the battery capacity drops from 100% down to 99%~95% with AC adapter connected, the battery will not charge until the power level drops below 95%.

3.  When the battery capacity remains around 94% to 97%, the battery will not charge with the AC adapter connected. You can unplug and re-connect the AC adapter several times to resume charging to 100%.

Source from https://www.asus.com/us/support/FAQ/1012793

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