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    • Genuine Battery EB-BG998ABY Compatible with Samsung Galaxy S21 Ultra 5G SM-G998
    Genuine Battery EB-BG998ABY Compatible with Samsung Galaxy S21 Ultra 5G SM-G998
    Genuine Battery EB-BG998ABY Compatible with Samsung Galaxy S21 Ultra 5G SM-G998
    Genuine Battery EB-BG998ABY Compatible with Samsung Galaxy S21 Ultra 5G SM-G998
    Genuine Battery EB-BG998ABY Compatible with Samsung Galaxy S21 Ultra 5G SM-G998

    Genuine Battery EB-BG998ABY Compatible with Samsung Galaxy S21 Ultra 5G SM-G998

    $18.99
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    Battery Capacity

    5000mAh/19.4Wh

    Brand

    YuYan

    Voltage

    4.45V

    Model No

    EB-BG998ABY

    Warranty

    12 months

    The Genuine EB-BG998ABY Battery is the official replacement battery for the Samsung Galaxy S21 Ultra 5G (Model SM-G998 series). Built with high-quality 5000mAh Li-ion cells, it delivers long-lasting power and ensures your Galaxy S21 Ultra runs smoothly throughout the day.

    If your phone is experiencing fast battery drain, overheating, random shutdowns, or reduced battery life, replacing it with the EB-BG998ABY genuine battery will restore your device to peak performance.

    Each battery is 100% brand new, factory tested, and designed with multiple layers of protection against overcharge, short-circuit, and overheating, ensuring both safety and durability.

     Key Features

    • Model: EB-BG998ABY

    • Compatible with: Samsung Galaxy S21 Ultra 5G (SM-G998U, SM-G998B, SM-G998N, etc.)

    • Battery Type: Rechargeable Li-ion

    • Capacity: 5000mAh (high capacity for extended use)

    • Voltage: 3.88V

    • Condition: Genuine / 100% brand new

    • Safety Protection: Overcharge, over-discharge, overheating, and short-circuit protection

    • Performance: Long-lasting, stable, and reliable power supply

     

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    Factory scene

    Samsung Galaxy S21 5G Genuine EB-BG991ABY Battery FAQ

    Q1: Which devices is this battery compatible with?

    A1: The EB-BG991ABY battery is specifically designed for the Samsung Galaxy S21 5G (SM-G991 series). It is not compatible with Galaxy S21 Plus, S21 Ultra, or other Samsung models.

    Q2: What is the battery capacity?

    A2: The EB-BG991ABY is a 4000mAh lithium-ion battery, providing long-lasting power and performance for the Samsung Galaxy S21 5G.

    Q3: Is this an original Samsung battery?

    A3: Yes. This is a genuine Samsung EB-BG991ABY battery, manufactured to the same standards as the original battery pre-installed in the Galaxy S21 5G.

    Q4: How long does the battery last per charge?

    A4: Under normal conditions, the 4000mAh battery supports a full day of usage, including calls, apps, internet, and standby. Battery life depends on individual usage and settings.

    Q5: Can I replace the Galaxy S21 battery myself?

    A5: The Galaxy S21 5G has a non-removable battery design, so replacement requires careful disassembly with the proper tools. If you are not experienced, professional installation is recommended.

    Q6: Does this battery support Samsung fast charging?

    A6: Yes. The genuine EB-BG991ABY battery supports Samsung Adaptive Fast Charging and is fully compatible with official wired and wireless chargers.

    Q7: How many charge cycles can this battery handle?

    A7: With proper care, the EB-BG991ABY battery lasts 300–500 full charge cycles, which typically equals 2–3 years of normal use.

    Q8: Does the battery include safety protections?

    A8: Yes. It comes with overcharge, over-discharge, overheating, and short-circuit protection, ensuring safe and reliable performance.

    Q9: How should I store the battery if I’m not using it?

    A9: Store the battery at 40%–60% charge in a cool, dry place. Avoid extreme temperatures and humidity.

    Q10: How should I dispose of the old Galaxy S21 battery?

    A10: Dispose of old batteries responsibly through a certified e-waste recycling facility. Do not burn, puncture, or throw in household trash.

    Focus on working not charging… 

    “3 years ago I ordered what I thought was a simple replacement battery for my laptop. Within weeks it overheated, lost charge quickly, and even damaged my charger port. I was shocked! I knew cheap batteries were risky, but I had no idea how quickly they could fail — and how dangerous they could be for my laptop. That experience inspired me to focus on reliable, safe, and long-lasting power solutions that people can truly trust.”

    Our world has become extremely dependent on laptops, yet too many people rely on cheap, low-quality batteries and adapters that fail quickly and create unnecessary e-waste. Many laptop users are aware of the frustration — shorter lifespans, overheating, constant replacements — and are searching for better solutions. But if we want to protect our devices, our data, and even our environment, we need to start choosing safer, longer-lasting, and more reliable power options.”

    CEO

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    Why YuYan?

    1. Where reliability meets performance

    UL (Underwriters Laboratories) and CE (Conformité Européenne) are globally recognized organizations that set the benchmark for product safety, performance, and compliance. Our laptop batteries and adapters are rigorously tested and certified to meet UL and CE standards, ensuring they are safe, reliable, and compatible with your device. This means every product you purchase from us has passed strict safety checks and delivers dependable power you can trust.

    2. UL & CE Certified Power Solutions

    Our laptop batteries and adapters are rigorously tested and certified to meet UL (Underwriters Laboratories) and CE (Conformité Européenne) safety standards. These certifications ensure that every product delivers consistent performance, protects against overheating, overcharging, and short circuits, and is fully compliant with international regulations. With UL & CE certified power solutions, you can trust that your laptop will run safely, efficiently, and without interruptions — at home, at work, or on the go.

    3. Sleek & Minimal Laptop Power

    Designed to complement your laptop, our batteries and adapters feature a sleek, modern look while delivering reliable power. Compact, minimal, and stylish — they fit perfectly into your workspace or on the go.

    4. Make Our Power Solutions Yours

    Don’t settle for unreliable batteries or adapters. Choose our certified, long-lasting power solutions and make them an essential part of your laptop experience — at home, at work, or on the go.

    5. Engineered for Compatibility: Powering Your Ecosystem.

    This addresses a major pain point. Customers need to know the charger works seamlessly not just with their laptop, but with their phone, tablet, and other USB-C devices. It positions YuYan as a unified power solution for all their tech, reducing cable clutter and complexity.

    6.Built to Last: Durability You Can Depend On.

    This directly counters the fear of buying a cheap product that breaks. It highlights quality construction (e.g., reinforced cables, robust connectors, premium materials) and implies a longer product lifecycle, which is a strong value argument over cheaper, disposable alternatives.

    7.Intelligent Charging: Protect Your Device's Battery Health.

    This showcases advanced technology. Modern chargers with intelligent chipsets can regulate voltage and current to avoid overcharging and overheating, which degrades batteries. This shows YuYan cares about protecting the customer's much more expensive laptop investment.

    8.Eco-Conscious Innovation: Responsible Power.

    This appeals to the environmentally conscious consumer. It can encompass energy-efficient operation (less wasted energy), the use of recyclable materials in packaging or products, and adherence to environmental standards like RoHS. This builds a positive, modern brand image.

    9.Globally Ready: A Worldwide Travel Companion.

    A huge benefit for travelers. If YuYan's chargers support 100-240V input voltage and come with interchangeable plugs (or a versatile design), this is a massive selling point. It tells the global citizen that this is the only charger they need to pack.

    For a Sustainable Laptop Future

    At YuYan, it all starts with a vision: to create reliable, safe, and long-lasting power solutions for laptops everywhere.

    Did you know that millions of low-quality laptop batteries and adapters fail every year, creating unnecessary e-waste and safety hazards? Immediate action needs to be taken to protect both your devices and the environment.

     

    That’s why YuYan was created — to provide high-quality, certified batteries and adapters that are safe, durable, and eco-conscious. We believe the best way to make a positive change is through the products people use every day. A portion of every purchase goes directly to supporting electronic waste reduction initiatives and responsible recycling programs.

     

    By choosing our products, you’re not only ensuring reliable power for your laptop — you’re helping reduce e-waste, protect the environment, and support a sustainable technology future. Thank you for making a difference!

    People Usually Ask

    1: How do I know if this battery/adapter fits my laptop?

    Please check your laptop model or the part number on your original battery/adapter. A full compatibility list is provided in the item description. If you are not sure, feel free to contact us before purchase.

    2: Is this an original (OEM) product?

    No, our products are brand-new high-quality replacement batteries/adapters, fully compatible with the original manufacturer’s specifications. All items are CE / FCC / RoHS certified.

    3: Does the voltage/capacity have to match exactly?

    Voltage (V) must match within ±0.5V of your original battery.

    Capacity (mAh/Wh) can be different: a higher capacity means longer runtime but may be slightly heavier.

    4: Do your batteries have a memory effect?

    No. Our batteries use Grade A Lithium-Ion/Polymer cells and are free from memory effect. You can charge or discharge at any time.

    5: Can I use an adapter with higher amperage or wattage?

    The voltage must match (e.g., 19V adapter for a 19V laptop).

    The amperage (A) and wattage (W) can be equal or higher, but not lower.

    6: How long is the battery lifespan?

    Typically 500–800 charge cycles, which is about 2–4 years under normal usage.

    7. How should I care for my battery?

    Avoid extreme heat or cold.

    Do not leave it plugged in for months without use.

    For long-term storage, keep the battery at 40–60% charge in a cool, dry place.

    8. Why does the battery arrive with partial charge?

    For shipping safety, all batteries are shipped with 30–60% charge. This is normal. Please fully charge the battery before first use..

    9. Do you provide warranty?

    Yes. All our batteries and adapters come with a 12-month warranty. If there is any quality issue, we offer replacement or refund.

    10. Don’t they cut a lot of trees to make these still?

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