Amazon.com: Synergy Digital Tablet Battery, Works with Samsung SM-T520 Tablet, (Li-Pol, 3.8V, 8220 mAh) Ultra Hi-Capacity Battery
Samsung GALAXY Tab Pro 10.1 SM-T520 Battery Replacement Kit with Tools, Video Instructions, Extended Life Battery and Full One Year Warranty - Walmart.com
Amazon.com: REYTRIC Replacement T8220E Battery Compatible with Galaxy Note 10.1 2014 Tablet Batteries with Tools fit SM-P600 SM-T520 SM-P605 Series 8220mAh 3.8V : Electronics
NEW Replacement Battery SP3676B1A For Samsung Galaxy Note 10.1 GT-N8000 P7500 P600 SM-T520 Tab S 10.5 T800 Note 8.0 GT-N5100 - AliExpress