I have 4 x 1Ah Lithium Ion battery packs. These I have two systems, one operates at 5V (usb) and the other requires 20v - 24v. I'm wondering can I power both the 5v system and the 20v system by using one USB port on the unit normally, and the other to wire the batteries in series? or am I misunderstanding the principal. Also, would this affect how I charges the batteries? or could I charge them normally using the micro USB.