![Battery for Samsung Galaxy S21 Ultra, [6000mAh] Upgraded 2026 New 0 Cycle EB-BG998ABY Battery Replacement for Samsung Galaxy S21 Ultra 5G SM-G998B/DS SM-G998U with Replacement Tool Kits](https://m.media-amazon.com/images/I/61BnFvRqctL._AC_SL3840_.jpg)
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🔋 Power up your Galaxy S21 Ultra with unstoppable energy!
This 2024 upgraded 6000mAh replacement battery for Samsung Galaxy S21 Ultra 5G offers a massive boost in capacity and longevity, supporting over 1000 charge cycles. Certified for safety with premium Grade A+ cells and equipped with a built-in IC chip, it ensures reliable, efficient charging. Compatible with all S21 Ultra 5G variants, it includes a handy repair toolkit for easy installation, making it the ultimate upgrade for professionals who demand peak phone performance.
| ASIN | B0CZ71V8JD |
| Antenna Location | Indoor/Outdoor |
| Battery Capacity | 2950 Milliamp Hours |
| Battery Cell Composition | NiMH |
| Battery Cell Type | NiMH |
| Battery Weight | 50 Grams |
| Best Sellers Rank | #35,274 in Cell Phones & Accessories ( See Top 100 in Cell Phones & Accessories ) #176 in Cell Phone Replacement Batteries |
| Brand | ITMBET |
| Customer Reviews | 4.3 out of 5 stars 80 Reviews |
| Manufacturer | Xunxuanmei Cross-border Business (Shenzhen) Co., Ltd. |
| Model Name | For S21U |
| Model Number | For S21U |
| Number of Batteries | 1 C batteries required. (included) |
| Recommended Uses For Product | Indoor/Outdoor |
| Reusability | Rechargeable |
| UPC | 732133012574 |
| Unit Count | 1.0 Count |
| Voltage | 3.87 Volts |
C**O
The right battery for the right money
Fast delivered and easy to install. It comes with tools. It worth the money
G**Y
Great battery
I'm 72 and was able to install this battery. My old battery was swollen and separated the case so that made it a little easier to open it up. My phone now looks like new and lasts longer on a charge than it did when it was new.
M**.
MUY BUENO
MUY BUENO
B**N
It works
Good parts, thank you!
I**A
Bateria de celular Samsung S21 Ultra
Muy buena la bateria funciono bien se ajusto a mi teléfono
P**O
Good
Good
F**.
Perfect Fit
This fit perfect in my s21 ultra 5g.
E**Y
My second battery lasting 3months
For S21 ultra, bought this December 23, 2025. I was excited to have it working normally. I followed the instructions to fill and and discharged fully. As of March, 2, 2026, it started depleting rapidly, then I had to plug it in to work, now, it just turns off at will. Now it's completely dead. Stop buying these batteries from Amazon, this was my second buy I will look somewhere else.
Trustpilot
1 week ago
1 month ago