电池容量衡量电池可存储最大能量， expressed in mAh for phones and Wh for laptops. 电池寿命是指设备在充电前能使用的小时数。电池健康度显示为原始容量的百分比，随充电循环而退化——e.g., Google Pixel 8a retains 80% capacity after 1,000 cycles. Higher capacity theoretically increases battery life, but real-world performance depends on usage, screen size, temperature, charging efficiency, and hardware. Fast/wireless charging causes 20-30% energy loss due to heat.
Apple silicon MacBooks outlast older Intel models due to efficiency. Companies test battery life using video playback; actual life varies daily. To extend battery life, update OS, lower brightness, close background apps, and monitor power-draining apps.
Battery health matters: after 1,000 cycles, a '100%' charge icon reflects reduced capacity.
来源: Engadget · 由HeadlinesBriefing整理摘要