• Need an OEM Battery for Samsung Galaxy S21 Ultra 5G? Original EB-BG998ABY Available
  • Need an OEM Battery for Samsung Galaxy S21 Ultra 5G? Original EB-BG998ABY Available
  • Need an OEM Battery for Samsung Galaxy S21 Ultra 5G? Original EB-BG998ABY Available
  • Need an OEM Battery for Samsung Galaxy S21 Ultra 5G? Original EB-BG998ABY Available
  • Need an OEM Battery for Samsung Galaxy S21 Ultra 5G? Original EB-BG998ABY Available
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    • New OEM Original EB-BG998ABY Battery Replacement for Samsung Galaxy S21 Ultra 5G G998 G998U

    New OEM Original EB-BG998ABY Battery Replacement for Samsung Galaxy S21 Ultra 5G G998 G998U

    $19.99
    $19.99
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    Recharge Your Legacy: Factory-Grade Power for Samsung Galaxy S21 Ultra 5G

    Is your Samsung Galaxy S21 Ultra 5G (G998 or G998U model) not lasting as long as it used to on a single charge? This is a common issue as phone batteries naturally wear out over time. Our New OEM Original EB-BG998ABY Battery is the real Samsung replacement part made specifically for your Galaxy S21 Ultra. As an original Samsung component, it's designed to work perfectly with your phone's charging system and fit exactly right. While the S21 Ultra has a sealed design that makes battery replacement more challenging (usually requiring professional help), once this genuine OEM battery is installed, you'll notice significantly better battery life - getting you through the day without constant charging.

    Feeling like your S21 Ultra's legendary power has faded? There's no need to retire a champion. Revive the beast with our OEM-Original EB-BG998ABY Battery—the true factory-spec power cell for Samsung Galaxy S21 Ultra G998. This isn't a compromise; it's a direct restoration of the marathon endurance your flagship was built for.

    Why This is the Only Battery That Measures Up

    Your S21 Ultra deserves the real thing. This is the exact OEM battery for Samsung Galaxy S21 Ultra 5G G998U, manufactured to Samsung's original blueprints. It’s the key to restoring that first-day performance—full system communication, flawless fit, and power you can trust through your longest days.

    Engineered for the Power User

    • Maximum-Capacity 5,000mAh Cell: Experience the long-lasting battery life for Samsung S21 Ultra 5G photographers and power users demand. This is the high-density cell that fuels all-day 5G browsing, intensive gaming, and pro-grade video capture without constant power anxiety.

    • Intelligent Power Regulation: Beyond simple power storage, its integrated circuit manages voltage with precision. This means stable performance for demanding use on Samsung Galaxy S21 Ultra G998, preventing the slowdowns and thermal throttling caused by inferior batteries.

    • Full S-Pen & Camera Suite Support: Powers the full ecosystem—from the responsive S-Pen for the S21 Ultra artist or note-taker to the sophisticated multi-lens camera system—without sacrificing performance in any mode.

    The Seamless, Secure Fit

    Designed as the direct-fit replacement battery for Samsung Galaxy S21 Ultra SM-G998U, it installs with perfect alignment. No bulging, no connection issues—just the secure, flush integration that protects your device's water resistance integrity and wireless charging capability.

    A Restoration, Not Just a Replacement

    This is the strategic choice for the savvy user. Why spend over a thousand dollars on a new phone when you can restore flagship performance to your Samsung S21 Ultra for a minimal investment? This battery revives:

    • All-Day 5G Browsing & Streaming

    • Extended Gaming Sessions

    • Marathon Photography & 8K Video Recording

    • Wireless PowerShare Functionality

    Your Phone is a Tool. Keep it Sharp.

    For the creative professional, the mobile gamer, or the business user who relies on their device, this is a maintenance essential. It’s the reliable power source for Samsung S21 Ultra business travel and creative workflows. This OEM-original battery ensures your tool remains as powerful and dependable as the day you invested in it.

    Reclaim the endurance that made your S21 Ultra legendary. Don't downgrade your experience with a generic substitute.

    Choose OEM-original power. Order the EB-BG998ABY battery today and restore your device to its peak.

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    • Guaranteed to be brand new

      The batteries we sell are all brand-new ones. We do not offer refurbished or used batteries.

      Quality is king, and integrity is the foundation.

    • 1-Year Warranty

      Looking for a durable laptop battery replacement with a 1-Year Warranty? Our high-performance batteries offer reliable power, free replacement service, and fast worldwide shipping.

    • 30-Day Return Guarantee

      Looking for a reliable laptop battery? Enjoy a 30-Day Return Guarantee with free exchange or full refund. Buy confidently with tested quality, fast shipping, and easy returns.

    • 24/7 Friendly Support

      Shop for your laptop battery replacement with confidence! Our 24/7 friendly customer support ensures fast help, technical guidance, and order assistance whenever you need it.

    Recharge Your Legacy: Factory-Grade Power for Samsung Galaxy S21 Ultra 5G

    Is your Samsung Galaxy S21 Ultra 5G (G998 or G998U model) not lasting as long as it used to on a single charge? This is a common issue as phone batteries naturally wear out over time. Our New OEM Original EB-BG998ABY Battery is the real Samsung replacement part made specifically for your Galaxy S21 Ultra. As an original Samsung component, it's designed to work perfectly with your phone's charging system and fit exactly right. While the S21 Ultra has a sealed design that makes battery replacement more challenging (usually requiring professional help), once this genuine OEM battery is installed, you'll notice significantly better battery life - getting you through the day without constant charging.

    Feeling like your S21 Ultra's legendary power has faded? There's no need to retire a champion. Revive the beast with our OEM-Original EB-BG998ABY Battery—the true factory-spec power cell for Samsung Galaxy S21 Ultra G998. This isn't a compromise; it's a direct restoration of the marathon endurance your flagship was built for.

    Why This is the Only Battery That Measures Up

    Your S21 Ultra deserves the real thing. This is the exact OEM battery for Samsung Galaxy S21 Ultra 5G G998U, manufactured to Samsung's original blueprints. It’s the key to restoring that first-day performance—full system communication, flawless fit, and power you can trust through your longest days.

    Engineered for the Power User

    • Maximum-Capacity 5,000mAh Cell: Experience the long-lasting battery life for Samsung S21 Ultra 5G photographers and power users demand. This is the high-density cell that fuels all-day 5G browsing, intensive gaming, and pro-grade video capture without constant power anxiety.

    • Intelligent Power Regulation: Beyond simple power storage, its integrated circuit manages voltage with precision. This means stable performance for demanding use on Samsung Galaxy S21 Ultra G998, preventing the slowdowns and thermal throttling caused by inferior batteries.

    • Full S-Pen & Camera Suite Support: Powers the full ecosystem—from the responsive S-Pen for the S21 Ultra artist or note-taker to the sophisticated multi-lens camera system—without sacrificing performance in any mode.

    The Seamless, Secure Fit

    Designed as the direct-fit replacement battery for Samsung Galaxy S21 Ultra SM-G998U, it installs with perfect alignment. No bulging, no connection issues—just the secure, flush integration that protects your device's water resistance integrity and wireless charging capability.

    A Restoration, Not Just a Replacement

    This is the strategic choice for the savvy user. Why spend over a thousand dollars on a new phone when you can restore flagship performance to your Samsung S21 Ultra for a minimal investment? This battery revives:

    • All-Day 5G Browsing & Streaming

    • Extended Gaming Sessions

    • Marathon Photography & 8K Video Recording

    • Wireless PowerShare Functionality

    Your Phone is a Tool. Keep it Sharp.

    For the creative professional, the mobile gamer, or the business user who relies on their device, this is a maintenance essential. It’s the reliable power source for Samsung S21 Ultra business travel and creative workflows. This OEM-original battery ensures your tool remains as powerful and dependable as the day you invested in it.

    Reclaim the endurance that made your S21 Ultra legendary. Don't downgrade your experience with a generic substitute.

    Choose OEM-original power. Order the EB-BG998ABY battery today and restore your device to its peak.

    Battery Capacity 5000 mAh
    Voltage 4.45V
    Model No EB-BG998ABY
    Warranty 12 Months
    Note:  

    New lithium-ion batteries must be fully charged and fully discharged two to three times before being fully conditioned.

    Please note that the full capacity and life of a new lithium-ion battery is only achieved after 2 to 3 full charge and discharge cycles.

    After you have gone through 2 to 3 cycles, you never have to condition the battery again.

    12 months warranty + 30 days refund guarantee + 24 x 7 email support.
    If for any reason you are not completely satisfied, please contact us.

     Shipping Policy: 

    1.Item will be shipped within 24 hours during the business days after payment has 
     been received. (Saturday. & Holidays excluded)  
     
    2.Transit times are provided by the carrier, exclude weekends and holidays,
    and may vary with package origin and destination, particularly during peak periods.  
     
    3.We ship the item to PayPal shipping address. Please tell us your shipping address
    if it is different from the one in PayPal.     
             
    4.The tracking number will be given for the customer to check the shipping status online.   
     
    5.We are not responsible for any wrong or undeliverable addresses. We can't change the shipping address
     after the item has been sent out. Please verify and update your shipping address on PayPal during checkout.
     
     
     
    1.A replacement will be provided for any defective or misrepresented products for the duration of
     the 1 year. A full refund can only be issued within 60 days.     
       
    2.If the return is due to the mistakes of buyers, for example, wrong purchase, no need of the batteries
     after transaction, or other artificial damages, the return shipping fee should paid by the buyer. 
     
    3.We can't receive if buyer return by yourselves according to the address on shipping package. 
     We won't solve such case and buyer should responsible for the consequences.Please contact with us before return the item.
     
     
    1.We have always been trying to provide the best service and reliable products for every customer,
     if you have any doubt,you can email us immediately.         
     
    2.If you are not satisfied with our item or service,please don't hesitate to contact us before you leave any feedbacks
     or open a case.Negative feedback can't solve the problem,we should solve this problem together and cooperate each other,please trust us,we will give u satisfied solution.
    Disclaimer:
    All batteries sold on accessories-mall.com are replacement parts. accessories-mall.com doesn't affiliate with any of the original manufacturers. Any registered trademarks or model names listed above are identified as purposes of showing compatibility only.

    New OEM Original Samsung Galaxy S21 Ultra 5G Battery | Genuine EB-BG998ABY Replacement for Models G998 & G998U

    Q1: Is this the official Samsung battery for the Galaxy S21 Ultra 5G?
    Yes, this is the 100% genuine Samsung battery with part number EB-BG998ABY, designed specifically for the Samsung Galaxy S21 Ultra 5G (Models G998, G998U). It’s the same battery that originally came with your phone, ensuring perfect compatibility and performance.

    Q2: Why should I choose this original Samsung battery?

    • Guaranteed phone recognition – Your S21 Ultra’s software will detect the battery immediately with no error warnings, and support advanced battery health monitoring in the Samsung Members app.
    • Full safety assurance – Built with Samsung’s multilayer protection circuit to prevent overcharging, overheating, and short circuits.
    • Complete fast-charging support – Works seamlessly with Super Fast Charging 25W, Fast Wireless Charging 2.0, and Wireless PowerShare.
    • Accurate power reporting – Provides real-time battery percentage, health status, and estimated runtime directly in your phone settings.

    Q3: What battery life can I expect after replacement?
    With this genuine OEM battery, your S21 Ultra 5G will regain its original all-day endurance:

    • Extended daily usage – Up to 12-14+ hours of mixed use (5G browsing, streaming, camera use, and moderate apps) on a single charge.
    • Stable power for high-performance tasks – Reliable voltage delivery supports the Snapdragon 888/Exynos 2100 chipset, Quad HD+ 120Hz display, and advanced camera features without unexpected shutdowns.
    • Long standby retention – Holds charge effectively overnight and supports Always On Display without significant drain.

    Q4: Will this battery fit perfectly in my S21 Ultra?
    Yes. The EB-BG998ABY is manufactured to Samsung’s exact mechanical and electrical specifications for the Galaxy S21 Ultra (G998/G998U). It matches the original battery’s dimensions, connector layout, and adhesive placement—ensuring a secure installation that preserves the phone’s slim build and IP68 water resistance when properly sealed.

    Q5: Can I install it myself? Is it recommended?
    Replacing the battery in the Galaxy S21 Ultra requires technical skill due to its sealed, adhesive-based design. If you are experienced, you will need:

    • A heat gun or hair dryer to soften the back adhesive.
    • Precision pry tools and opening picks.
    • New adhesive strips or pre-cut gasket to reseal the phone.

    For most users, we strongly recommend professional installation to ensure the IP68 rating is maintained and to avoid accidental damage to the display, rear glass, or internal components.

    Q6: What are the risks of using a non‑Samsung battery?
    Third-party or counterfeit batteries often result in:

    • “Unknown battery” alerts, incorrect battery percentage, or sudden shutdowns.
    • Incompatibility with Samsung-certified fast charging or wireless charging.
    • Faster capacity degradation, potential swelling, and risk of damaging the phone’s motherboard or display.
    • Lack of support for Samsung’s software features, including the 85% Protect Battery charging limit and adaptive power management.

    Choosing the original Samsung battery ensures your S21 Ultra operates safely, reliably, and as originally engineered.

    Simply put:
    If your Galaxy S21 Ultra 5G no longer holds a charge like it used to, the genuine Samsung EB-BG998ABY battery is the trusted, high-performance replacement that restores all-day power—with full compatibility for fast charging, wireless charging, and Samsung’s intelligent battery features.

    Power your flagship. Choose Samsung original.

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