Free coursesShortsLabGuidesQuizGamesSearchOur workAbout & contact
MYTHMyth or Fact · #17EP.193 · 24 s

Myth or Fact: a bigger-watt charger will fry your phone?

Cover of the lesson: Myth or Fact: a bigger-watt charger will fry your phone?▶ Tap to play
Subscribe on YouTube Follow on Instagram
MYTHTHE VERDICT
// WHAT YOU WILL LEARN

MYTH: the phone and charger agree on the power (USB PD); the phone only takes what it can handle, so a certified 65 W charger is safe for a 20 W phone.

// LESSON NOTES

Will a big 100 W charger fry your 20 W phone? 🔌📱 MYTH!

🤝 The phone and the charger talk first (USB Power Delivery): the charger lists what it can do — 5, 9, 15, 20 V…
📱 The phone asks for what it can take: "20 W, please!" → the charger agrees: 9 V × 2.22 A.
⬇️ The phone PULLS the power — the charger never pushes more. A 100 W charger just has spare power left over.
⚠️ The real danger: cheap fake chargers with no safety marks (poor insulation, no protection).
✅ Any certified charger is fine — look for UL (USA), CE / UKCA (Europe / UK) or BIS (India).

Read the voiceover (transcript)
  1. A big-watt charger will fry your phone? Really?
  2. Myth! The phone and charger talk first.
  3. The phone asks for twenty watts. The charger agrees.
  4. So a hundred-watt charger only gives what the phone asks.
  5. Guess: what can really hurt your phone?
  6. A cheap fake with no safety marks!
  7. Any certified charger is fine!
  8. Next: can a laptop port damage your phone? Follow for more!

Related lessons

FACT EP.177 · Myth or FactMyth or Fact #15: "Airplane mode makes your phone charge faster" MOSTLY MYTH EP.209 · Myth or FactMyth or Fact #19: "Leaving Bluetooth on drains your battery" → MOSTLY MYTH EP.169 · Myth or FactMyth or Fact #14: "A bigger power bank charges your phone faster" → MYTH MYTH EP.217 · Myth or FactMyth or Fact #20: "Full signal bars mean fast internet"