I'm trying to build a set of 18650-based batterybank devices of various voltages (5-12 V). I assumed I would charge these devices via USB-C.
Looking into the USB standards, I see 5 A is the highest available amperage in any USB flavor. I've been using 2S and 3S BMS breakout boards to charge my batteries and they have max. current draws of 7 A and 10 A.
How do I charge multi-cell battery banks from a USB 5 A source when the BMS draws in excess of the USB standard? How are large devices such as laptops powered with this amperage limitation?