I installed my old HDD from my old HP Envy on my Legion 5 after i bought it but after a year i upgraded it with a 1TB m.2 NVMe SSD, I also tried to upgrade the battery from the 60Wh version to the 80Wh version twice but it didnt work out and one of the batteries i was allowed to keep after getting full refunds, The battery works and charges normally but i cant boot up my laptop on battery without plugging in the AC Adapter. I might buy another one soon but this time with a 3rd party battery instead testing my luck with Lenovo Genuine batteries