Review on AmyZone Fast QI Receiver Type A For Samsung Galaxy J6-S5-A9-Note 4/LG V10-Stylo 2-3-Plus/Google Nexus 4-G4 Ultra-Thin 5W 1000MAh Wireless Charging Receiver Adapter Compatible All Wireless Chargers by Karen Anderson

This thing charges so slowly that my 2800mah battery still hasn't charged after almost a WEEK of being at least 16 hours a day on a Qi charger and various Qi chargers . It consumes half a lamp at 5V, so the charger draws 2.5W of power. The phone maker says that 18W should charge the phone in an hour, so theoretically it should get 15% of its charge in an hour at 2.5W, even maybe 10% assuming some inefficiency. I left it on the charger for 8 hours, the phone hardly charges more than when it started and gets very hot. Other QI receivers I've had haven't had this issue.