---
product_id: 701994206
title: "Galaxy S21 Ultra Battery, (2024 Upgraded) 6800mAh EB-BG998ABY Li-Polymer Battery Replacement Compatible with Galaxy S21 Ultra 5G SM-G998B/DS SM-G998U with Screwdriver Tool Kit"
brand: "snronew"
price: "฿2345"
currency: THB
in_stock: true
reviews_count: 8
category: "Snronew"
url: https://www.desertcart.co.th/products/701994206-galaxy-s21-ultra-battery-2024-upgraded-6800mah-eb-bg998aby-li
store_origin: TH
region: Thailand
---

# 6800mAh Ultra Capacity Pro Tool Kit Included Multi-layer Safety Chip Galaxy S21 Ultra Battery, (2024 Upgraded) 6800mAh EB-BG998ABY Li-Polymer Battery Replacement Compatible with Galaxy S21 Ultra 5G SM-G998B/DS SM-G998U with Screwdriver Tool Kit

**Brand:** snronew
**Price:** ฿2345
**Availability:** ✅ In Stock

## Summary

> 🔋 Power up your Galaxy S21 Ultra like a pro — never settle for less than all-day charge!

## Quick Answers

- **What is this?** Galaxy S21 Ultra Battery, (2024 Upgraded) 6800mAh EB-BG998ABY Li-Polymer Battery Replacement Compatible with Galaxy S21 Ultra 5G SM-G998B/DS SM-G998U with Screwdriver Tool Kit by snronew
- **How much does it cost?** ฿2345 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/701994206-galaxy-s21-ultra-battery-2024-upgraded-6800mah-eb-bg998aby-li)

## Best For

- snronew enthusiasts

## Why This Product

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

## Key Features

- • **Seamless Compatibility:** Specifically engineered for Galaxy S21 Ultra models SM-G998B/DS and SM-G998U—perfect fit guaranteed.
- • **Power That Lasts All Day:** 6800mAh capacity delivers extended usage so you never miss a beat during your busiest days.
- • **Built-In Smart Protection:** Advanced microchip safeguards against overcharging, overheating, and short circuits for peace of mind.
- • **Optimized Battery Lifespan:** Follow simple 3-5 full charge cycles post-installation to unlock peak performance and longevity.
- • **DIY Friendly with Pro Tools:** Includes a precision screwdriver kit and adhesive strip for a confident, professional-grade battery swap.

## Overview

This 2024 upgraded 6800mAh Li-Polymer replacement battery for the Galaxy S21 Ultra (models SM-G998B/DS, SM-G998U) comes with a built-in microchip for multi-layer safety protections and a professional screwdriver tool kit. Designed to restore and extend your phone’s battery life, it ensures reliable, long-lasting power with easy DIY installation guidance. Ideal for millennials who demand peak performance and safety in their tech essentials.

## Description

Kindly Suggestion: 1. If you want to replace the battery more easily, it is recommended that you search for a replacement battery video on YouTube, which will give you professional guidance and methods. 2. We suggest that the power should be 100% used up and fully charged for 3-5 times after finished replacing the battery, this can fully activate the battery performance. Note:Especially attention for the details of removing adhesive strip. Plz keep old battery in complete condition when unloading it. It will catch fire or explode if accidentally puncture. COMPATIBLE MODELS: -Galaxy S21 Ultra (EB-BG998ABY) Package Included: - 1 x Replacement Battery for S21 Ultra - 1 x Repair Tool Kit - 1 x Adhesive strip **************************************************************** FAQ after installation Q1. Why battery connector does not fit? A1: Please check if you have bought and received wrong model battery, this battery is only for Galaxy S21 Ultra. Check the model number on the back of your phone . Q2. Why phone can’t turn on? A2: Make sure battery connector was connected correctly and charge phone for 15 minutes with original charger and cable. The charging needs to be charged to 5% before it can be turned on normally, If battery have exhausted battery power. Q3. Why battery won’t charge? A3: Maybe bad connect. Reopen your phone and reconnect the battery connector to logic board socket. Make sure battery connector connects well.

Review: Reliability Battery - is been a nice experience, I did change the battery my own, because I want my sister to have a reliable phone, I got the new version, so I can help her with my old, after I full charge it, y pas 10 days and still have the full charge, I was expecting a 70 or less charge, but what surprise, still full. yes is reliable battery from this store.
Review: Good Replacement Battery Strong Capacity but Installation Is Tricky - This upgraded 6800mAh battery works well once it’s installed. The charge lasts noticeably longer than the original S23 Ultra battery, and the phone runs normally with no overheating or errors. It’s a solid option if your original battery is worn out. The only downside is that installation is a bit tricky. The included tools help, but opening the S23 Ultra takes patience, heat, and careful prying. Once it’s in, though, the battery performs great and holds a strong charge throughout the day. Overall, a good high-capacity replacement, just be ready for a careful install.

## Features

- Rigorous Quality Inspection: All batteries undergo thorough testing before shipping to ensure your phone performs just as well as when you first received it.The built-in microchip provides multiple protections against overcharging, over-discharging, short circuits, and overheating.
- Compatible Models: This battery replacement is compatible with S21 Ultra models such as SM-G998B/DS SM-G998U Before purchasing, please verify your current battery's part number and model.
- Usage Tips: It is recommended to fully discharge and recharge the S21 Ultra battery, especially during the initial 3 charging cycles. This practice can significantly enhance the overall battery lifespan.Keep in mind that optimal performance and longevity are typically achieved after 3 to 5 complete charge and discharge cycles.
- Long-Lasting Battery: Restore your EB-BG998ABY battery's performance and save money.Experience rapid charging from 0% to 100% in seconds by simply swapping batteries. We highly recommend watching relevant online videos before installation.
- Customer Assistance :Please contact us if you encounter any issues with our product.We guarantee to resolve any concerns to your satisfaction within 24 hours.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CLRK3RBQ |
| Batteries | 1 Lithium Polymer batteries required. (included) |
| Best Sellers Rank | #17,003 in Cell Phones & Accessories ( See Top 100 in Cell Phones & Accessories ) #30 in Cell Phone Replacement Batteries |
| Color | Black |
| Customer Reviews | 3.8 3.8 out of 5 stars (304) |
| Date First Available | February 6, 2019 |
| Item Weight | 5.1 ounces |
| Item model number | YYS6 |
| Manufacturer | Shenzhen FengYunTong Technology Co., Ltd. |
| Other display features | CE |
| Package Dimensions | 6.42 x 3.31 x 0.94 inches |

## Product Details

- **Battery Cell Composition:** Lithium Polymer
- **Brand:** SNRONEW
- **Number of Batteries:** 1 Lithium Polymer batteries required. (included)
- **Reusability:** Rechargeable
- **Voltage:** 13.5 Millivolts

## Images

![Galaxy S21 Ultra Battery, (2024 Upgraded) 6800mAh EB-BG998ABY Li-Polymer Battery Replacement Compatible with Galaxy S21 Ultra 5G SM-G998B/DS SM-G998U with Screwdriver Tool Kit - Image 1](https://m.media-amazon.com/images/I/71M2yt753XL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Reliability Battery
*by A***L on October 14, 2025*

is been a nice experience, I did change the battery my own, because I want my sister to have a reliable phone, I got the new version, so I can help her with my old, after I full charge it, y pas 10 days and still have the full charge, I was expecting a 70 or less charge, but what surprise, still full. yes is reliable battery from this store.

### ⭐⭐⭐⭐⭐ Good Replacement Battery Strong Capacity but Installation Is Tricky
*by L***S on November 16, 2025*

This upgraded 6800mAh battery works well once it’s installed. The charge lasts noticeably longer than the original S23 Ultra battery, and the phone runs normally with no overheating or errors. It’s a solid option if your original battery is worn out. The only downside is that installation is a bit tricky. The included tools help, but opening the S23 Ultra takes patience, heat, and careful prying. Once it’s in, though, the battery performs great and holds a strong charge throughout the day. Overall, a good high-capacity replacement, just be ready for a careful install.

### ⭐ Two bad batteries in a row.
*by J***F on January 21, 2026*

The first battery didn't work at all and this battery isn't much better. add a few dollars and get a different brand. Or you can do like I did and cheap out and get two bad batteries in a row. I,m tired of the return process so the only place this crappy battery is going is in the trash can. I'll brake down and spend the extra money and buy a real battery. The return process went very smooth I'm just not doing it twice in a row. well it is 2/16/2026 and the second batter completely crapped out now i am with out a phone.

## Frequently Bought Together

- SNRONEW Galaxy S21 Ultra Battery, (2024 Upgraded) 6800mAh EB-BG998ABY Li-Polymer Battery Replacement Compatible with Galaxy S21 Ultra 5G SM-G998B/DS SM-G998U with Screwdriver Tool Kit
- Perzework Rear Back Glass Replacement for Samsung Galaxy S21 Ultra 5G with Pre-Installed Adhesive and Repair Tool Kits (Phantom Black)

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-03-05*