All features work from the onboard microprocessor, which communicates on to your battery. The MP00205A starts with high amperage to obtain the battery charged up fast, after which slows down automatically to a decrease amperage because it reaches potential. Most phones and tablets will get reasonably fast charging, but recall https://stephenfqjfb.wikitron.com/1269309/the_smart_trick_of_wireless_car_charger_that_works_with_apple_carplay_that_nobody_is_discussing