Genuine 4000mAh EB-BG991ABY Battery for Samsung Galaxy S21 5G (G991) & S21 FE (G990)

All-Day Power Restored for Your Samsung Galaxy S21

Don't let a degrading battery tether you to a wall charger. Is your Samsung Galaxy S21 draining fast, shutting down, or not holding a charge? The genuine EB-BG991ABY 4000mAh replacement battery is the perfect OEM solution. Designed to fit your phone's specs, it brings back all-day battery life and top performance.

The Technical Advantage: Safety and Longevity First

• 100% Fresh Grade-A Cells: The smartphone repair market has many cheap batteries. Refurbished or salvaged options can degrade and swell faster over time. We use only brand-new, premium Grade A lithium-ion cells. This guarantees a true 4000mAh capacity and up to 800+ optimal charge cycles.

• Intelligent Battery Management System (BMS): Equipped with an advanced, factory-calibrated BMS microchip, this battery guarantees stable and efficient charging performance. It actively communicates with your Galaxy S21's motherboard to prevent overcharging, extreme voltage drops, and overheating, even during intensive tasks like 4K video recording or 5G gaming.

• OEM Fit and Fast Charge Compatible: Because this is a genuine replacement, it perfectly supports Samsung's 25W Super Fast Charging and 15W Fast Wireless Charging protocols without triggering hardware warnings.

Technical Specifications:

Guaranteed Compatibility:

This battery is a direct, drop-in replacement designed specifically for the following Samsung Galaxy models:

• Samsung Galaxy S21 5G: SM-G991, SM-G991U, SM-G991U1, SM-G991W, SM-G991B, SM-G991N

• Samsung Galaxy S21 FE 5G: SM-G990, SM-G990U, SM-G990U1, SM-G990B, SM-G990E

• (Note: Please verify your original battery model number (EB-BG991ABY) before purchasing to ensure a perfect fit.)