Asus Laptop Battery Technical Discussion
Asus Laptop Battery Technical Discussion
Battery lifecycle
- Due to the chemical properties of Lithium ions, battery capacity decreases gradually with use over time. This is a normal phenomenon.
- The life of a Li-ion battery is approximately between 300-500 cycles. Under normal usage conditions and in ambient temperatures (25℃), the Li-ion battery is expected to discharge and recharge normally for 300 cycles (or about one year). Afterwards the battery capacity will drop to 80% of its initial capacity.
- Battery life decline varies with the system design, model, system power consumption, program and operating software consumption, and power management settings. High/low operating temperatures and abnormal operations may result in 60% or more rapid decrease of the battery’s life cycle within a short time.
- The battery’s discharge rate depends on the laptop’s or tablet’s software operations and power management settings. For example, running computation-heavy programs, such as graphics software, gaming software, and video playing, consumes more power than running general word processing software. When a battery-charged laptop is externally connected to additional USB or Thunderbolt devices, the battery power will also discharge faster.
Battery protection mechanisms
- 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.
Note: A battery’s charge initiation capacity (%) is usually set between 90%-99%. The actual value will differ by model. - 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.
- Even though the device has been turned off and the AC adapter is removed, the system still needs slight power consumption, so it’s a normal scenario when the battery level still goes down.
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