I just purchased a replacement battery for a DELL XPS 13 9360.
With the previous battery, the laptop would die as soon as the power cord was unplugged and it '''always''' had a yellow flashing light.
Dell BIOS system tests indicated a bad battery.
With the battery replacement, the indicator light no longer flashes yellow continuously and the BIOS tests pass. The battery will not charge past 46% and the laptop still dies immediately if power cord is unplugged.