Your numbers are a bit high, wired chargers have become more efficient and barely waste any energy, see here: (14wh spent to charge a 13wh battery) https://www.

Your numbers are a bit high, wired chargers have become more efficient and barely waste any energy, see here: (14wh spent to charge a 13wh battery) https://www.researchgate.net/publication/309917872_Improving_wireless_charging_energy_efficiency_of_mobile_phones_Analysis_of_key_practices https://www.researchgate.net/publication/309917872_Improving... The last bit is also wrong, 6wh * 10M = 600 Teslas. You can also read as “600 Teslas can provide phone charging for ten million people for an entire year”, take it as you wish... Your fridge can easily use 100kWh a month. You’ll save far more energy by closing the door a couple seconds early every time you open it. Phone charging is a drop in the bucket.