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  1. Home
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  3. Callum Pears
Callum Pears - Researcher & writer at Which?

Callum Pears

Researcher & writer

Callum pushes tech to its limits and has spent nearly three years bombarding antivirus with malware, taxing routers and inspecting computer monitors

35 articles
  1. 2026

    1. 12 Jun
      Two women, one wearing a black tank top and the other in a patterned shirt, focus on their smartphones outdoors.

      Best power banks and portable chargers

      Portable power bank chargers
    2. 01 Jun
      A hand holds a black and red USB flash drive, with a blurred background of soft light and a surface below.

      Best USB sticks: fast memory sticks and flash drives reviewed

      External hard drives and USB sticks
    3. 19 May
      Assorted batteries including Duracell, Energizer, and GP Lithium, floating against a pale pink background.

      Best AA and AAA batteries

      Batteries
    4. 18 May
      Four Wi-Fi routers and network devices on a light blue background, featuring various shapes and designs.

      Best wi-fi routers

      Wi-fi routers and extenders
    5. 14 May
      Stylish turntable on a wooden table, playing a record, with two glasses of yellow drink and a plate of nuts beside it.

      Best record players and turntables

      Record players and turntables
    6. 14 May
      Man with white hair and a pink striped shirt talks on a flip phone while browsing products on a grocery store shelf.

      Best dumb phones

      Simple mobile phones
    7. 11 May
      A stylish white speaker sits on a wooden table beside a pink vase with flowers, with sunlight illuminating the scene.

      Best radios

      Radios
    8. 07 May
      Colorful digital shield icon on a circuit board background, symbolizing cybersecurity and data protection.

      Best antivirus

      Antivirus software packages
    9. 22 Apr
      Laptop displaying a warning message about a virus detected, with a person's hand on the keyboard and a coffee cup nearby.

      How to get rid of a computer virus

      Computing
    10. 16 Apr
      Woman with headphones smiles while participating in a video call on a monitor, surrounded by books and a plant.

      Best computer monitors

      Computer monitors
    11. 02 Apr
      Laptop on a wooden table displaying a colorful macOS background with a large Apple logo in the centre, next to a coffee cup.

      Best Mac antivirus 2026: top protection for your Apple devices

      Antivirus software packages
    12. 30 Mar
      VPN connection established on computer and smartphone

      Best VPNs 2026

      VPN services
    13. 15 Mar

      79% of smart dash cams we tested had security issues

      Car technology
    14. 24 Feb
      A hand holds a car dash cam while it captures a scenic view outside, with a vehicle's interior visible above.

      Best dash cams

      Dash cams
    15. 23 Feb
      A hand connects a USB cable from a green external hard drive to a laptop on a yellow surface.

      Best external hard drives: our top portable storage picks rated

      External hard drives and USB sticks
    16. 20 Feb
      Various network devices, including a mesh router, extenders, and smart speakers in differing designs.

      Best mesh networks and wi-fi extenders

      Wi-fi routers and extenders
    17. 03 Feb
      A person uses a laptop on a wooden table, participating in a video call with multiple attendees displayed on the screen.

      6 ways to improve wi-fi in the garden or outdoors

      Computing
  2. 2025

    1. 10 Dec
      AA battery charger displaying a green charging status screen with four inserted batteries on a wooden surface.

      Best AA and AAA rechargeable batteries

      Rechargeable batteries
    2. 10 Dec
      Two e-readers, one labeled "Kobo" and the other "Kindle"

      Best e-readers

      Ebook readers
    3. 20 Nov

      Warning: your computer doesn't protect you from phishing

      Computing