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Islandwide delivery · Warranty on every device

Sterling Tech

How We Test Used Laptops

Last updated 1 September 2026

Every used laptop goes through the same process before it reaches our shelves or your doorstep.

The test

  1. Identity check: serial number matches the unit, no locks (BIOS, MDM or activation lock).
  2. Battery: capacity and cycle count are measured. We record the health percentage and show it on the listing.
  3. Display: dead pixels, backlight bleed, brightness and hinge tension.
  4. Keyboard and trackpad: every key and click is tested.
  5. Ports: USB, video out, audio jack, card reader and charging port.
  6. Wireless and camera: Wi-Fi, Bluetooth, webcam and microphone.
  7. Storage and memory: SMART health check and a memory test.
  8. Thermals: fan and temperature under load.
  9. Clean install: fresh OS, updates and drivers.
  10. Final clean: internal dusting, external cleaning and a photo check.

Grading guide

Grade Cosmetic condition Function
A Near-mint. No marks visible at normal viewing distance. Fully tested, working
B Light signs of use: minor scuffs on the lid or palm rest. Fully tested, working
C Visible wear: scratches or small dents. Lower price. Fully tested, working

Grades describe appearance only. Performance does not depend on the grade.

On-demand used laptops

Units we source from suppliers after you order go through the same test in our workshop before they are shipped to you. If a unit fails, we return it to the supplier and offer you a replacement or a full refund.