How to Check a Used Laptop's Battery Before You Pay
A battery that dies in an hour can ruin a good laptop. Here is how to test one in ten minutes, in the shop or at home.
The battery is the part of a used laptop that wears out first, and the one buyers forget to test. A laptop that only runs while plugged in is really a small desktop. Ten minutes of checking before you pay saves you a replacement later.
1. Look at the battery report
On a Windows laptop, open Command Prompt and type powercfg /batteryreport. It saves a report showing the design capacity (what the battery held when new) and the full charge capacity (what it holds now). If the second number is above roughly 70% of the first, the battery is in decent shape. Below 50% it will feel weak in daily use.
2. Watch the percentage drop
Unplug the charger and use the laptop normally for five minutes. A healthy battery loses a few percent. If it falls by a quarter or jumps from 40% to shutdown, the cells are tired.
3. Check the charger and the port
Plug the charger in and make sure the charging light or icon comes on and stays on. Wiggle the plug gently: a loose charging port is a repair, not a battery fault, but you should know before you buy.
4. Ask what is covered
Batteries are consumables, so ask the seller to say clearly what they will do if the battery fails in the first weeks. At Daylink every laptop is tested before sale, and you are welcome to run these checks in the shop before you pay.
Ready to look? Browse our laptops or message us on WhatsApp and we will check the battery of the exact unit you like.
