Since official Apple support has ended, your options are limited to third-party retailers and DIY kits:
: Local, non-authorized repair shops may still have stock of third-party batteries and can perform the labor for you. Is it Worth Replacing? can you buy a new battery for iphone 5
: You can purchase replacement batteries from online marketplaces like Amazon or AliExpress . These are manufactured by third parties rather than Apple. Since official Apple support has ended, your options
: Companies like iFixit and NewPower99 offer "Fix Kits" that include a new battery along with the specialized tools needed for the installation. Since official Apple support has ended