Windows hides a surprisingly powerful diagnostic for laptop owners: one command — powercfg /batteryreport — will generate a human-readable HTML battery report that exposes design capacity, current full‑charge capacity, recent usage, capacity history and life estimates, allowing you to see...
Windows includes a built‑in diagnostic that can tell you, in plain numbers, whether your laptop battery is merely tired or truly failing — and it’s one command away.
Background
Laptop batteries are consumable parts: they age, their usable capacity falls, and the moment they stop holding charge...