Premium EB-BG991ABY Replacement Battery for Samsung Galaxy S21 5G - 4000mAh High Performance
Professional-grade replacement battery engineered specifically for Samsung Galaxy S21 5G SM-G991U1. This high-performance EB-BG991ABY battery delivers exceptional power with 4000mAh capacity and 3.88V output, ensuring your Galaxy S21 5G maintains peak performance for demanding applications, 5G connectivity, and all-day flagship smartphone usage.
📱 Galaxy S21 5G Flagship Performance
- High Capacity Design: 4000mAh provides extended usage time for intensive 5G applications and flagship features
- 5G Optimized Power: Specifically engineered to support Galaxy S21 5G's advanced connectivity and performance
- Stable Power Output: 3.88V lithium-ion technology ensures consistent flagship smartphone performance
- Premium Quality Cells: Grade A lithium-ion cells for reliable, long-lasting power delivery
- Perfect Compatibility: Precisely designed to match original EB-BG991ABY battery specifications
⚡ Technical Specifications
- Battery Model: EB-BG991ABY
- Capacity: 4000mAh
- Voltage: 3.88V
- Battery Type: Lithium-ion
- Weight: 200g
- Color: Black
- Warranty: 1-Year Premium Flagship Battery Warranty
🔧 Compatible Device Model
This EB-BG991ABY replacement battery is specifically designed for:
- Samsung Galaxy S21 5G SM-G991U1 - Flagship 5G smartphone
- Direct replacement for original EB-BG991ABY battery part number
📲 Galaxy S21 5G Advanced Benefits
- ✅ All-Day 5G Performance: Extended battery life for high-speed 5G network operations and connectivity
- ✅ Flagship Photography: Reliable power for advanced camera features, 8K video recording, and computational photography
- ✅ Gaming Excellence: Sufficient power for mobile gaming with flagship processor performance
- ✅ Productivity Power: Optimized for multitasking, Samsung DeX, and professional applications
- ✅ Fast Charging Support: Compatible with Galaxy S21 5G's rapid charging and wireless charging technology
🛡️ Quality Assurance & Safety
KingSener specializes in premium flagship smartphone batteries with advanced safety features including overcharge protection, temperature control, and short circuit prevention. Each battery undergoes rigorous testing to ensure optimal performance and safety for your valuable Galaxy S21 5G.
📋 Important Compatibility Notice
This replacement battery is designed specifically for Samsung Galaxy S21 5G SM-G991U1 using EB-BG991ABY specification. Please verify your original battery model number before ordering. Professional installation recommended for optimal performance and warranty coverage.
Restore your Galaxy S21 5G's flagship performance and enjoy uninterrupted 5G smartphone experience with our reliable replacement battery!
Note:
This is not a complete list or inclusion of all compatible laptop models. You can open the back of your laptop to check the original battery model. If you have any compatibility questions, please contact us online.High Quality Garanteed
Our battery products are manufactured using high-quality materials and advanced technology to ensure stability and reliability.
The casing is made of durable materials, the mainboard adopts advanced technology, and the battery core is produced with high-quality raw materials to ensure that it will not be damaged after long-term use.
Our products are equipped with multiple protection technologies such as overvoltage, overcurrent, and overcharge to effectively protect the safety of batteries and equipment.
The casing is made of durable materials, the mainboard adopts advanced technology, and the battery core is produced with high-quality raw materials to ensure that it will not be damaged after long-term use.
Our products are equipped with multiple protection technologies such as overvoltage, overcurrent, and overcharge to effectively protect the safety of batteries and equipment.
China warehouse delivery method
Shipping Methods
Ship To
Est. Delivery Time
Shipping Cost
Taxes & Fees
USPS
United States(No AK/HI, PR/GU, PO Boxes, or APO/FPO)
10-15 business days
Free
Free
Canada Post
Canada
10-15 business days
Free
Free
Royal Mail / Yodel
United Kingdom
15-20 business days
Free
Free
Local Carriers
Germany/Netherlands/Norway
15-20 business days
Free
Free
La Poste
France
15-20 business days
Free
Free
Local Carriers
Australia/New Zealand
15-20 business days
Free
Free
Correios
Mexico/Spain/IT
15-25 business days
Free
Free
Local Carriers
SE Asia / East Asia
5-10 business days
Free
Free
Local Carriers
Rest of Europe
20-25 business days
From $5.99
Free
Local Carriers
UAE / Saudi Arabia / Israel
16-20 business days
From $7.99
Free
Overseas Warehouse Shipping Times & Costs
Shipping Methods
Ship To
Est. Delivery
Shipping Cost
Taxes & Fees
US Warehouse
United States
3-7 business days
Free
Free
European Warehouse
EU countries
5-7 business days
€0 – €5.99
pricing varies by country
Free
UK Warehouse
United Kingdom
3-7 business days
Free
Free
Canada Warehouse
Canada
5-7 business days
Free
Free
Payment Methods
Paypal
Payments by PayPal, no PayPal account required. Paypal is safe and free for buyers.
PayPal account: Payment@batterymall.com
Account Name: ShenZhen KingSener Science and Technology Co., Ltd
Credit or debit card
VISA, MasterCard, the United States n Express,Maestro & Laser Card, APPLE Pay,etc.
PayPal never shares your financial information with us.
WeChat Pay
Currently only supports QR code payment. Please contact WeChat customer service and go to WeChat App to scan the QR code to complete the payment.
Google Pay
Pay with Google Pay, which is more convenient and faster.
Apple Pay
If you use an Apple device, you can use Apple Pay to pay, which is more convenient and faster.
Bank Transfer
If you cannot use the above payment methods and the order amount exceeds HK$2000, please contact our customer service to obtain your bank account and pay via bank transfer.
Q&A
Quick FAQ:Laptop Battery Care & Troubleshooting
- What Should I Know Before Buying a Laptop Battery Replacement?A: Before buying a laptop battery replacement, confirm your laptop’s exact model number and the part number printed on the original battery. Check the battery voltage, connector, physical dimensions, and compatibility list. Do not choose a battery based on appearance alone, because similar laptop models may use different batteries. Review the seller’s warranty, return policy, and product specifications before ordering.
- How Do I Find a Compatible Laptop Battery for My Device?A: To find a compatible laptop battery, identify your laptop’s full model number and the part number on the original battery. Compare these details with the replacement battery’s compatibility list and specifications, including voltage, connector type, and dimensions. If you are unsure, contact customer support with your laptop model and original battery part number before placing an order.
- Can I leave my laptop plugged in 24/7?Yes, the built-in TI chip prevents overcharging. Tip: To prevent long-term cell swelling, unplug and drain the battery to 40% twice a month.
- Why Is My Laptop Battery Not Charging?A: A laptop battery may not charge because of a faulty AC adapter, damaged charging port, loose connection, temperature protection, battery-health settings, or a worn-out battery. Confirm that you are using a compatible charger and inspect the cable and port for visible damage. Restart the laptop and review the manufacturer’s battery or charging settings. If the battery becomes unusually hot, swollen, or damaged, stop using it and seek professional assistance.
-
Are BatteryMall Laptop Batteries Reliable?BatteryMall laptop batteries are designed with safety and reliability in mind. All batteries feature built-in IC protection against short-circuits, over-voltage, and overheating, helping protect the battery during normal use. They are also CE, FCC, and RoHS certified. For the best experience, choose a compatible laptop battery that matches your exact laptop model and original battery part number, and follow the installation and care instructions. BatteryMall also provides a 1-year warranty on KingSener batteries purchased from BatteryMall; see the Product Warranty page for details.