I love my N5, but the battery is dying, and I've also had to replace the power button too. I would like to keep using it, but the battery plus the lack of soft

I love my N5, but the battery is dying, and I've also had to replace the power button too. I would like to keep using it, but the battery plus the lack of software updates is pushing me back into the market... (When I become Prime Minister, providing only 3 years of security support for a product that ought to last at least 5 will become illegal...)