Lithium-Ion batteries have a much shorter shelf-life than NiCd, Alkaline, or other batteries. It is a bad idea to purchase a battery now so you can replace the Nothing Phone 2 in 5 years. The Battery may have lost 40% of its ability to hold a charge by then, or something like that. This was a common problem with 16550 batteries used to power Thinkpad laptops in a 6-cell or 9-cell battery pack.
