---
product_id: 381923428
title: "Galaxy S21 Ultra Battery, (Upgraded) MAXBEAR 5500mAh 3.85V Li-Polymer Replacement Battery EB-BG998ABY for Samsung Galaxy S21 Ultra 5G SM-G998B/DS SM-G998U with Repair Tool Kit"
brand: "maxbear"
price: "16194 Ft"
currency: HUF
in_stock: true
reviews_count: 8
category: "Maxbear"
url: https://www.desertcart.hu/products/381923428-galaxy-s21-ultra-battery-upgraded-maxbear-5500mah-3-85v-li
store_origin: HU
region: Hungary
---

# 3.85V optimized voltage 5500mAh powerhouse Built-in microchip protection Galaxy S21 Ultra Battery, (Upgraded) MAXBEAR 5500mAh 3.85V Li-Polymer Replacement Battery EB-BG998ABY for Samsung Galaxy S21 Ultra 5G SM-G998B/DS SM-G998U with Repair Tool Kit

**Brand:** maxbear
**Price:** 16194 Ft
**Availability:** ✅ In Stock

## Summary

> 🔋 Power up your Galaxy S21 Ultra — because running out of juice is so last year!

## Quick Answers

- **What is this?** Galaxy S21 Ultra Battery, (Upgraded) MAXBEAR 5500mAh 3.85V Li-Polymer Replacement Battery EB-BG998ABY for Samsung Galaxy S21 Ultra 5G SM-G998B/DS SM-G998U with Repair Tool Kit by maxbear
- **How much does it cost?** 16194 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/381923428-galaxy-s21-ultra-battery-upgraded-maxbear-5500mah-3-85v-li)

## Best For

- maxbear enthusiasts

## Why This Product

- Trusted maxbear brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Safety Tech:** Integrated microchip safeguards against overcharging, overheating, and over-discharging, extending your battery’s lifespan and your peace of mind.
- • **Endless Power Boost:** Upgrade your Galaxy S21 Ultra with a massive 5500mAh battery for all-day productivity and entertainment without the panic of running low.
- • **Hassle-Free Confidence:** Includes a 12-month warranty and a repair toolkit, empowering you to restore your phone’s power like a pro and stay connected without compromise.
- • **Precision Compatibility:** Specifically engineered for Samsung Galaxy S21 Ultra models SM-G998, G998B, and G998U — no guesswork, just perfect fit and performance.
- • **Certified Quality Assurance:** Crafted with premium Grade A cells and backed by CE, ROHS, and UL certifications to guarantee durability and reliability you can trust.

## Overview

The MAXBEAR 5500mAh Li-Polymer replacement battery is a high-capacity, premium-grade upgrade designed exclusively for Samsung Galaxy S21 Ultra 5G models SM-G998 series. Featuring advanced microchip protection and certified quality standards, it ensures longer battery life, enhanced safety, and reliable performance. The package includes a repair toolkit and a 12-month warranty, making it the ultimate solution to revive your phone’s endurance and keep you ahead in your fast-paced professional life.

## Description

Product Specifications - Battery Capacity: 5,500 mAh - Battery Type: Lithium Ion Polymern - Voltage Output: 3.85 V - Watt-hour: 21.17Wh COMPATIBLE MODELS -Samsung Galaxy S21 Ultra 5G -SM-G998 -SM-G998B -SM-G998U Package Includes: -Replacement Battery for Galaxy S21 Ultra x 1 pcs. -12 Month Warranty Internal batteries, (IE: Phone replacement batteries), require technical knowledge to replace, and may be hazardous and/or cause damage or future damage to phone if done incorrectly. Do not expose to extreme temperatures, below 0F - above 140F. Never charge battery for longer than 24 hours. DISCLAIMER: (Must read and acknowledge before buying) Opening up your device to perform a modification or repair may void your warranty if applicable.

Review: NIce kit - got the battery replaced and phone and battery are charged.
Review: Fit Samsung galaxy s21 fe - No problem. It's very slow, so it's better for this battery to charge quickly with my old, weak one.

## Features

- 🍀【Brand New Battery 】: MAXBEAR Replacement battery for Samsung Galaxy S21 Ultra , bring life back to your phone with a replacement battery. Make your phone acting like a brand new
- 🍀【Top Quality Battery】: Made of grade A premium battery cells, long lasting and durable. Build-in microchip to prevent over-charging, over-discharging and over-heating, which will help lengthen battery life. STRICT QUALITY-CONTROL. CE, ROHS and UL certified. Long battery life cycle
- 🍀【Compatible Models】: Compatible with Samsung Galaxy S21 Ultra Only, Model: S21 Ultra 5G SM-G998 G998B G998U [Note: Not for Samsung Galaxy S21 , S21 Plus or other Galaxy model.]
- 🍀【Spare Battery Specs】: Galaxy S21 Ultra Replacement battery has a capacity of 5500mAh. The Battery type is Lithium Ion, the Voltage is 3.85V.
- 🍀【Customer Satisfaction】: 12 Month Warranty for customer satisfaction guaranteed, Pls contact us if you have any questions. Customer satisfaction is our highest priority.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09H6PSWR3 |
| Batteries | 1 Lithium Polymer batteries required. |
| Best Sellers Rank | #33,880 in Cell Phones & Accessories ( See Top 100 in Cell Phones & Accessories ) #128 in Cell Phone Replacement Batteries |
| Color | Galaxy S21 Ultra Battery |
| Customer Reviews | 4.0 4.0 out of 5 stars (459) |
| Date First Available | April 20, 2021 |
| Item Weight | 5.3 ounces |
| Item model number | YY21RB |
| Manufacturer | MAXBEAR |
| Other display features | Wireless |
| Package Dimensions | 6.54 x 3.35 x 1.06 inches |

## Product Details

- **Battery Capacity:** 5500 Milliamp Hours
- **Battery Cell Composition:** Lithium Polymer
- **Brand:** MAXBEAR
- **Number of Batteries:** 1 Lithium Polymer batteries required.
- **Recommended Uses For Product:** Galaxy

## Images

![Galaxy S21 Ultra Battery, (Upgraded) MAXBEAR 5500mAh 3.85V Li-Polymer Replacement Battery EB-BG998ABY for Samsung Galaxy S21 Ultra 5G SM-G998B/DS SM-G998U with Repair Tool Kit - Image 1](https://m.media-amazon.com/images/I/41ErvIEb6xL.jpg)
![Galaxy S21 Ultra Battery, (Upgraded) MAXBEAR 5500mAh 3.85V Li-Polymer Replacement Battery EB-BG998ABY for Samsung Galaxy S21 Ultra 5G SM-G998B/DS SM-G998U with Repair Tool Kit - Image 2](https://m.media-amazon.com/images/I/41NK4k6x3NL.jpg)
![Galaxy S21 Ultra Battery, (Upgraded) MAXBEAR 5500mAh 3.85V Li-Polymer Replacement Battery EB-BG998ABY for Samsung Galaxy S21 Ultra 5G SM-G998B/DS SM-G998U with Repair Tool Kit - Image 3](https://m.media-amazon.com/images/I/51N6qPCanQL.jpg)
![Galaxy S21 Ultra Battery, (Upgraded) MAXBEAR 5500mAh 3.85V Li-Polymer Replacement Battery EB-BG998ABY for Samsung Galaxy S21 Ultra 5G SM-G998B/DS SM-G998U with Repair Tool Kit - Image 4](https://m.media-amazon.com/images/I/51Q-FQSedzL.jpg)
![Galaxy S21 Ultra Battery, (Upgraded) MAXBEAR 5500mAh 3.85V Li-Polymer Replacement Battery EB-BG998ABY for Samsung Galaxy S21 Ultra 5G SM-G998B/DS SM-G998U with Repair Tool Kit - Image 5](https://m.media-amazon.com/images/I/51Y8K8ipL5L.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ NIce kit
*by B***E on December 23, 2025*

got the battery replaced and phone and battery are charged.

### ⭐⭐⭐⭐⭐ Fit Samsung galaxy s21 fe
*by H***K on March 13, 2025*

No problem. It's very slow, so it's better for this battery to charge quickly with my old, weak one.

### ⭐ Overall not a great product
*by A***R on July 27, 2024*

This isn't my first effort opening electronics to replace components such as batteries. Samsung wanted a lot to replace my battery so I thought I would give it a try. There are a number of kits available and I chose this one because it was the quickest to arrive. Looking back it was a mistake. Let's go through the kit: Pick: Worked Screwdriver: Worked but magnetic would have been a great help. Ended up using my own which was magnetic. Suction cup: Worthless, worthless, worthless. Having a functioning suction cup is critical to the process. Metal tool: Why you would include a metal tool rather than plastic is beyond me, an oversight on my part. Sim removal tool: Because? Two sticky strips: Wasn't sure about these so I stuck them to the bottom of the battery. Battery: The connector cable from the battery was too long and went past the socket on board. I had to bend it back a bit to make it fit. Fingers crossed this doesn't cause any problems. With so many options available I would avoid this one.

## Frequently Bought Together

- MAXBEAR Galaxy S21 Ultra Battery, (Upgraded) 5500mAh 3.85V Li-Polymer Replacement Battery EB-BG998ABY for Samsung Galaxy S21 Ultra 5G SM-G998B/DS SM-G998U with Repair Tool Kit
- PHONSUN Back Battery Door Cover Adhesive Tape for Samsung Galaxy S21 Ultra 5G SM-G998U G998U1 G998 (Pack of 2)
- Galaxy S21 Ultra Back Glass Cover Replacement for Samsung Galaxy S21U S21 Ultra 5G SM-G998B G998U G998U1 G998W Housing Door with Camera Glass Lens Parts and Pre-Install Tapes (Phantom Black)

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*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-02-05*