Hi everyone Have a 1 month old 2018 15" MPB i7 2.6Ghz 512GB model and I feel like my battery is not performing anywhere near it should. Before I conclude that it is in fact the battery, I thought I would ask a few questions. 1. Does the dongle drain power when plugged in? I have been using this for connecting a 2nd 21" HD display and accessing USB devices from time to time. I feel like it simply drains battery by having it plugged in so have no disconnected it when not in use https://satechi.net/products/aluminum-type-c-multimedia-adapter 2. Does using an external monitor drain battery faster? So far, I have only really been browsing the internet and have been getting around 2-3hours max usage with the external monitor. Is that normal? I'm now testing the battery drain without the external monitor and no dongle and it does appear to be much better but need more time to ascertain what type of time I'll get out of a full charge.