Don't panic, it is normal when Asus q524uq battery can't be charged to 100%

Not always happen when a battery can not charged to 100%, this is because most battery has it's own battery protection mechanisms, including Asus q524uq.

We all know that frequently charging a battery under high voltage will quicken its aging. To extend battery life, when a battery maintains 90%-100% power after being fully charged, the system may not recharge due to battery protection mechanisms.
*     A battery’s charge initiation capacity (%) is usually set between 90%-99%. The actual value will differ by model.

ASUS batteries charged or stored under high ambient temperatures may have permanently damaged capacity and accelerated battery life decline. When the battery temperature is too high or becomes overheated, battery charging capacity will be limited or even stop. This is part of the system’s battery protection mechanisms.

Source from www.asus.com.

Asus q524uq battery

Brand new asus q524uq 15.2V 3410mAh laptop batteries
Voltage: 15.2V
Capacity: 3410mAh (52Wh)
Battery cells: 4-cell
Chemical: Li-ion
Battery Color: black
Condition: new original battery
Warranty: 9 months