Have nTB base model (256gb ssd though) 2017 13 inch. I am coming from 2015 13 inches. Issue: I am not getting more than 6 hours battery life. Work: Spark (email), Excel, 5 safari tabs, slack, zoom (web conferencing tool), Google drive, and fantastical 2 Set up: External monitor hooked up with HDMI via Satechi adaptor. Using apple magic mouse and keyboard (Bluetooth) Losing 10% of battery in 20-25 minutes. Anyone facing similar issue? How is your battery holding up?