Aspire E15 will not operate on battery power if the memory or hard drive access doors are not installed correctly - Acer Community
Amazon.com: Acer Aspire E 15 E5-575-33BM 15.6-Inch Full HD Notebook (Intel Core i3-7100U Processor 7th Generation , 4GB DDR4, 1TB 5400RPM Hard Drive, Intel HD Graphics 620, Windows 10 Home), Obsidian Black :