Amazon.com: NEWDERY Battery Case for Galaxy S21 Plus 6.7" 10000mAh, Fast Charging & Qi Wireless & Android Auto Supported, Extended Battery Charger Protective Case for Samsung S21+
S21, S21 Plus, and S21 Ultra. The matte backs look dope! The vanilla S21's the only one in the series with a plastic back. : r/samsung
Samsung Galaxy S21 vs. Galaxy S21 Plus vs. Galaxy S21 Ultra | Tom's Guide