amperage

Hi, I have an old Acer laptop. I lost the original charger, and I bought a generic one. The original charger was 19V and 3.42A, and the new one is 19V and 3.0A. The laptop works great, except a USB port is not working, and also sometimes it beeps. It happens, I think, when it is under "load"...

i will buy a power bank that has 86000mah 3.5 Amperage max and 19V and my leptops AC/DC adapter is 19v 6.15 that is capable of runing my laptop at full tdp and charge the battery same time.And my laptops internal battery is 11.15 V 4400 mah. 1-What happens if i plug this power bank instead of...