No they do not sell batteries for the iPad.
From the Best Buy app: "Apple Authorized Service Provider. iPhone screen repair, iPhone battery replacement and more. No matter where you purchased your iPhone, you can count on Best Buy for help when you need repairs. As a full-service Apple Authorized Service Provider, we use only genuine service parts that come directly from Apple. If you’re looking for iPhone repair near you, you can always find a Best Buy location that is certified in iPhone repair. Our expert Geek Squad Agents can fix whatever ails your phone, including iPhone cracked screen repair, iPhone battery replacement, water damage, fixes for software issues, and repair of components like cameras, speakers, vibe motors and more, for certain models." Visit their website for all the details.
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