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Adityasharma
A standard charger has a power of 5 to 10 watts. A faster charger can increase this power up to eight times. For example, the iPhone 13s supports a 30 watt charge while the Huawei Mate 40 Pro has 66 watt chargers. Unless there is a technical defect in your battery or the charger’s electronics, using a fast charger will not damage your phone’s battery in the long run.
What is long term is the remaining 20 or 30% of a charge, which can take as long as the first 70 or 80%. This last part is the second phase of a charge, which manufacturers have to manage by carefully slowing down the charging speed, otherwise the process could damage the battery.
Venkat Srinivasan, a researcher at Argonne National Laboratory, writes:
"Unless something goes wrong with the battery’s circuitry, you can’t overcharge a modern phone. They have built-in protection to prevent this from happening.
I rarely charge my battery to more than 80/85% and try never to drop it below 20%. This is why a 45w charger is more than sufficient, both in terms of charging speed and power.
