All capabilities work through the onboard microprocessor, which communicates directly to your battery. The MP00205A starts with high amperage to obtain the battery charged up fast, and then slows down automatically to a decrease amperage mainly because it reaches capacity. There are hundreds, if not 1000's, of low cost USB https://modernbookmarks.com/story18705728/red-light-flashing-on-car-charger-fundamentals-explained