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Galaxy S21 Battery, [Upgraded] 4800mAh Li-Polymer EB-BG991ABY Replacement Battery for Samsung Galaxy S21 5G SM-G991U1 with Repair Tool Kit [12 Month Service]
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Galaxy S21 Battery, [Upgraded] 4800mAh Li-Polymer EB-BG991ABY Replacement Battery for Samsung Galaxy S21 5G SM-G991U1 with Repair Tool Kit [12 Month Service]
Please double check your phone model prior to purchasing to ensure this replacement battery is compatible with your phone.
Galaxy S21 Battery, [Upgraded] 4800mAh Li-Polymer EB-BG991ABY Replacement Battery for Samsung Galaxy S21 5G SM-G991U1 with Repair Tool Kit [12 Month Service]
Item #: 220881564

Galaxy S21 Battery, [Upgraded] 4800mAh Li-Polymer EB-BG991ABY Replacement Battery for Samsung Galaxy S21 5G SM-G991U1 with Repair Tool Kit [12 Month

Item #: 220881564
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What Stands Out

High Capacity
The upgraded 4000mAh capacity ensures your Galaxy Note 5 lasts longer, providing more usage time for daily tasks without the need for constant recharging.
Complete Kit
Includes a repair tools kit, making the battery replacement process straightforward and convenient for users, even those with minimal technical skills.
Extended Warranty
Comes with a 24-month service guarantee, offering peace of mind and assurance about the product's durability and reliability, surpassing many competitors.

Product Details

Get an [Upgraded] Galaxy S21 Ultra Battery Replacement with 5700mAh capacity. Compatible with Samsung Galaxy S21 Ultra 5G SM-G998. Includes repair tool kit and 24-month service. Buy now. Shop at Ubuy Montserrat
  • Compatible with Samsung Galaxy S21 Ultra 5G (SM-G998) model
  • Upgraded replacement battery with a capacity of 5,700mAh
  • Battery type: Lithium Ion Polymer
  • Voltage output: 3.85V
  • Comes with a repair tool kit for easy installation
  • 24-month service warranty provided
BrandUNKLOU
Model NumberYYS21
ManufacturerShenzhen FengYunTong Technology Co., Ltd.
ReusabilityRechargeable
Antenna LocationPhone
Recommended Uses For ProductPhone
Item Weight0.2 lbs (90 grams)

Dangerous Goods

To avoid the delay in customs clearance process for Dangerous Goods, the shipment shall be opened at our warehouse facility to check the severity of hazardous components. Please see the list of Dangerous goods here.

Who Should Buy?

Suitable For
  • Heavy Users

    Ideal for users who frequently utilize their Galaxy Note 5 for gaming or streaming, requiring longer battery life.

  • DIY Enthusiasts

    Great for individuals comfortable with self-repair, as it includes tools and instructions for easy battery replacement.

  • Budget-conscious Users

    A cost-effective alternative to expensive repairs or new phones, extending the life of the Galaxy Note 5.

Not Suitable For
  • Non-technical Users

    Not suitable for users unfamiliar with smartphone repairs, as installation may require technical skills.

Product Description

Galaxy S21 Battery, [Upgraded] 4800mAh Li-Polymer EB-BG991ABY Replacement Battery for Samsung Galaxy S21 5G SM-G991U1 with Repair Tool Kit [12 Month Service]

Have any Query? Chat with us

Customer Questions & Answers

  • Question: What makes the upgraded 5700mAh battery better than the original for the Galaxy S21 Ultra?

    Answer: The upgraded 5700mAh battery offers a higher capacity compared to the original battery, allowing for longer usage between charges. With enhancements in Li-Polymer technology, this battery ensures better heat management and longevity. Users will appreciate extended screen time during activities like streaming or gaming, as well as improved performance during intensive tasks. This upgrade is ideal for heavy smartphone users who need reliable power throughout the day.
  • Question: Is it easy to install the Galaxy S21 Ultra replacement battery?

    Answer: Yes, the installation process for the Galaxy S21 Ultra replacement battery is designed to be user-friendly, especially with the included repair tool kit. Following the provided step-by-step instructions allows even those with minimal technical skills to replace their battery effectively. Practical use cases include quick replacements at home when your phone battery drains too fast, ensuring you can enjoy your device without interruptions.
  • Question: How long can I expect the upgraded Galaxy S21 Ultra battery to last?

    Answer: The upgraded 5700mAh battery typically lasts a full day or more, depending on your device usage. With moderate use—which includes browsing, social media, and making calls—users can expect substantial power reserve throughout their day. Scenarios like a long business trip or a day-long outing can benefit greatly from this longevity, as it reduces the need for constant recharging.
  • Question: Is this replacement battery compatible with all Galaxy S21 Ultra models?

    Answer: Yes, this replacement battery is specifically designed for the Samsung Galaxy S21 Ultra 5G SM-G998 model. Ensuring compatibility is crucial, as using a battery not meant for your device could lead to performance issues. When replacing, always confirm your phone model to avoid complications and to enjoy the seamless performance that the specific battery offers.
  • Question: What tools are included in the repair kit for the Galaxy S21 Ultra battery?

    Answer: The repair tool kit includes essential tools such as a screwdriver, prying tools, and adhesive strips to facilitate a smooth battery replacement process. Each tool is selected to simplify the operation and prevent damage to your device. This kit is especially useful for DIY enthusiasts or anyone who prefers a hassle-free installation experience without a trip to the repair shop.
  • Question: Will using a third-party battery void my warranty?

    Answer: Using a third-party battery could potentially void the warranty of your device, depending on the manufacturer's policy. However, many users opt for reputable replacements like the upgraded 5700mAh battery, especially if the original battery has degraded. Always check your specific warranty terms for clarity and consider documenting your battery replacement for future reference.
  • Question: Can I return the Galaxy S21 Ultra battery if it doesn't meet my expectations?

    Answer: Return policies vary by retailer, but many e-commerce platforms, including Ubuy, offer flexible return options. If the upgraded battery does not meet your expectations or is incompatible, you typically can return it within a certain timeframe. Make sure to keep the original packaging and any included documentation to ensure a smooth return process.
  • Question: How do I properly dispose of my old Galaxy S21 Ultra battery?

    Answer: Proper disposal of old batteries is essential for environmental safety. Most regions have designated recycling centers for electronic waste, including phone batteries. Consider contacting your local waste management facility or searching for nearby recycling programs that accept lithium-polymer batteries. Recycling helps minimize environmental impact and supports sustainability efforts.
  • Question: Where can I buy the Galaxy S21 Ultra replacement battery in Montserrat?

    Answer: You can buy the Galaxy S21 Ultra battery, [Upgraded] 5700mAh Li-Polymer EB-BG998ABY Replacement, through Ubuy. Ubuy provides a hassle-free shopping experience with swift delivery options and customer support to assist you any time during your purchase journey, ensuring that you can easily acquire the battery you need for your device.

UNKLOU Batteries YYS21 Editorial Review

The UNKLOU Galaxy S22 Battery replacement has garnered mixed reviews from customers, primarily revolving around its ease of installation and performance. Many users appreciated the straightforward installation process, often facilitated by video tutorials. The accompanying repair tool kit includes highly praised screwdrivers, which are noted for their efficiency in handling the multitude of screws involved in the battery replacement. Users with little to no experience in battery replacement found the instructions clear and the tools manageable. Battery performance, however, presents a varied perspective. While some users reported satisfactory battery life, with the device lasting up to 30 hours on moderate use, there were notable criticisms about its longevity compared to the original battery. Some expressed disappointment, feeling that the replacement did not meet expectations of longevity and capacity, leaving them wishing for improvements. Additionally, users advised Prospective buyers to be prepared for challenges during the installation, particularly in removing the back cover of the device. In summary, while the UNKLOU Galaxy S22 battery replacement offers decent value and a user-friendly installation experience, its performance has not universally satisfied all customers, with some experiencing shorter lifespan than anticipated. **

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Pros

  • Easy installation process, aided by video tutorials.
  • Excellent quality screwdrivers included in the tool kit.
  • Satisfactory battery life for some users, lasting nearly a full day.

Cons

  • InConsistent battery performance; some users reported it lasts shorter than expected.

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Features & Benefits

  • Battery Capacity: 5,700 mAh
  • Battery Type: Lithium Ion Polymer
  • Voltage Output: 3.85 V
  • Watt-hour: 21.94Wh
  • Compatible with Samsung Galaxy S21 Ultra 5G (SM-G998)
  • Package includes replacement battery and manual guide

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