2018 Macbook Pro drains battery super fast when connected to external monitor
I have recently replaced the battery. The new battery appears to operate at a normal drain rate when using the MacBook Pro without an external monitor (~9 hours normal use).
I have a very recent model monitor (LG Ultra HD), connected to the MacBook Pro using USB-C to DisplayPort. Once the monitor is connected, the battery lasts only 3-4 hours, even when I'm not doing anything graphic intensive (like typing this message or sending an email or browsing a website).
This cannot be normal.
The laptop also gets very hot when I play a video on the monitor.
I wonder if anyone has a solution to this. Thanks.
MacBook Pro 15", macOS 10.14