New battery stopped working 3 weeks after installation?

I need to exchange this battery. It stopped working yesterday after about 3 weeks of use. How do I exchange the battery? Tools worked fine

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crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0