@stevestreza Yes, great idea. My Plantronics Voyager headset needed a new battery after 8 years of service. Replacement is impossible. So I did it anyway. Took about an hour and a half but I enjoy patiently figuring out how to get it apart without breaking it. New LiPO battery cost me $12. Works like new.
(I also have a complete set of tools for doing this kind of thing -- miniature crowbars, etc. But it can be done.)
Much better would be replaceable batteries and products that don't deliberately induce failures when you do replace the battery. (I'm talking about you, Samsung.)