Use the charger that came with the phone, not a random one
A mismatched charger caps you well under the phone's real charging speed. Fewer than five independent reports so far, so it is still unverified — try it and file one.
Why it works
Fast charging needs the phone and charger to negotiate a matching power profile. A charger rated for less wattage, or missing the right fast-charge protocol, forces the phone down to a slow fallback speed regardless of what the phone itself supports.
Did it work for you?
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