Hi [NAME] welcome to this free user-to-user Alienware laptop discussion forum.  Please Remove Base cover. On new OEM Battery, look at year/month date on white label beneath square matrix, see following image.   [IMAGE] The Battery date should be less than six months old. If the purchased OEM battery is old, it might be near to end of life and unable to hold its charge. When using laptop on ac adapter (charger) power, unplug ac adapter and then create windows Battery Report.  How to check battery health on Windows 11 | Windows Central.   How to generate a Battery Report in Windows 10 | Windows Central.  
Hello, I have recently change the battery of my Alienware m15 R1 laptop. Everything work fine when the ac adapter is plugged. The battery charging correctly. And when I unplug the ac adapter, the battery take the relay properly. However, when it is shutdown, I cannot power on it when the ac adapter isn't plugged. Someone had a similar issue and success to resolve it ? Thank you in advance. Victor 
m15 R1, power on ONLY with AC power adapter