1. Use QC2.0/3.0 quick charging adapter (9V / 1.67A) for better charging. 2. Place the phone in the center of the wireless charging sensor zone. 3. Charging distance is approximately 2-6mm / 0.08-0.24in. Avoid using a protective case thicker than 3mm / 0.12in. 4. Avoid metal or magnetic objects between the phone's back center and a 6cm / 2.36in diameter. 5. Charging speed is faster in colder temperatures compared to warmer ones. 6. Do not charge the phone when the car temperature is high to avoid circuit damage.