What factor contributes to the reduced lifespan of a mobile device battery?

Overcharging is a significant factor that contributes to the reduced lifespan of a mobile device battery. Lithium-ion batteries, which are commonly used in mobile devices, have a limited number of charge cycles. When a battery is consistently charged beyond its maximum capacity, it can lead to overheating and increased wear on the battery's internal components. This process not only reduces the overall capacity of the battery over time but can also lead to chemical reactions within the battery that further diminish its longevity.

In contrast, other factors like frequent updates, low storage space, and minimal usage generally do not have the same direct impact on the battery's lifespan. Frequent updates may cause the device to use battery power more frequently due to processing needs, but they do not affect the battery's chemistry in the same way overcharging does. Low storage space primarily impacts the device's performance and user experience rather than battery health. Minimal usage can actually prolong a battery's lifespan since less frequent charging can prevent unnecessary wear, especially if the battery is kept at an optimal charge level.