The secret of accurate battery life of mobile phone

Hit：40   Addtime：2025-08-13 01:17:40

How long a phone's 1% battery life can last depends on many factors, such as the phone's battery capacity, how the manufacturer calculates the remaining power, the degree of optimization of the phone's operating system, and the types of applications the user is using.

Estimating lithium battery capacity is a complex process, that relies on monitoring the chemical reactions within the battery, which is barely can do it accurately so far. Instead indirectly estimate the lithium battery capacity by monitoring parameters such as voltage and charge.

The relationship between the voltage and charge level of a mobile phone battery is not linear. As the battery charge gradually decreases, especially when it is nearly fully discharged, the voltage drops rapidly. If the charge level is displayed directly based on voltage changes, the charge level display may suddenly drop significantly, for example, from 15% to 0%.

The voltage is affected not only by the remaining charge in the battery itself, but also by various external factors such as temperature and the battery's operating state (such as the charge or discharge rate). To improve the accuracy of charge estimation, mobile phones also use a coulomb counter to measure the amount of charge released by the battery. The coulomb counter calculates the difference between the total charge and the amount of charge consumed, helping the phone more accurately predict the remaining charge level.

However, due to various factors, the remaining charge displayed by the mobile phone is still only an estimate, not a precise value. While the introduction of coulomb counters has significantly improved the accuracy of battery life prediction, it still cannot achieve 100% accuracy. Coulomb counters estimate remaining battery life by measuring the amount of charge flowing in and out of the battery. However, in practice, factors such as battery aging, temperature fluctuations, and sensor accuracy limitations can lead to certain errors.

How long does a 1% charge last?

Due to the uncertainty of battery life prediction, various mobile phone manufacturers have adopted different battery life display strategies. The ideal charging range is between 20% and 80%, which effectively reduces the damage caused by charge and discharge cycles and help your battery lifetime last longer.