Amazon.com: Battery Kit for Samsung Galaxy Tab Pro 8.4 SM-T320, SM-T325, SM-T327, SM-T321 with Tools, How-to Video and Battery from NewPower99 : Electronics
Original Battery T4800e For Samsung Galaxy Tab Pro 8.4 "sm-t320 T321 T325 T327 - Battery Charger Cases - AliExpress
Phone Battery For Samsung Galaxy Tab Pro 8.4" SM-T320 T321 T325 T4800U 4800mAh | eBay
Battery for use with Galaxy Tab Pro 8.4
Samsung Galaxy Tab Pro 8.4 review: great screen, disappointing battery life | Engadget