Buying a used or refurbished laptop? The battery is the #1 thing that fails — and the #1 thing sellers hide. Here’s how to check it yourself in under a minute.

Why it matters

On a used laptop, the screen and processor last for years. The battery wears out. A weak battery = your laptop is chained to a charger. And you can’t see battery health in a photo — so check it before you pay.

Check it on Windows (60 seconds)

  1. Open Start → type cmd → open Command Prompt
  2. Run: powercfg /batteryreport
  3. Open the battery-report.html file it creates
  4. Compare Design Capacity vs Full Charge Capacity

The closer the two numbers, the healthier the battery.

What the numbers mean

  • 90%+ → excellent
  • 80–90% → good (normal for used)
  • Below 70% → worn, replace soon

On a Mac

Apple menu → System Settings → Battery → Battery Health. Shows condition + max capacity %.

Can’t run it yourself? Ask the seller

  • What’s the tested battery health?
  • Is it checked on every unit?
  • Is the battery under warranty?

If they dodge these — walk away, however big the discount.

FAQ

How do I check laptop battery health on Windows? Run powercfg /batteryreport in Command Prompt, open the HTML file, compare Design vs Full Charge Capacity.

What’s a good battery health % for a used laptop? 80%+ is good, 90%+ is excellent, below 70% needs replacing soon.

Can I check before buying a refurbished laptop? Yes — run the report in 60 seconds, or ask the seller to state tested health in writing.

At NewAsNew, we test and disclose battery health on every laptop — because when you spend ₹25,000, you deserve facts, not hope. If a unit doesn’t pass, it doesn’t get sold. Browse certified refurbished laptops.