Wired vs. wireless charging: Which is better for battery health?

Wireless charging is up to 30% less efficient than wired charging, producing excess heat that can reduce lithium-ion battery capacity by up to 12% over two years or 25% in hot environments. Qi-certified systems adjust current and voltage to limit overheating, and manufacturers throttle charging rates when the phone warms beyond safe limits. For optimal battery longevity, use wireless charging for daytime top-ups and wired charging for overnight full charges, keeping the battery between 20% and 80% and ensuring proper alignment and case compatibility.