---
product_id: 672360842
title: "Battery for Samsung Galaxy S21, Upgraded 4900mAh Durable High-Capacity Replacement with Repair Tool Kit, Compatible with SM-G991U SM-G991F"
brand: "ruemiu"
price: "14846 Ft"
currency: HUF
in_stock: true
reviews_count: 8
url: https://www.desertcart.hu/products/672360842-battery-for-samsung-galaxy-s21-upgraded-4900mah-durable-high-capacity
store_origin: HU
region: Hungary
---

# 4900mAh high capacity Includes full repair toolkit Smart IC chip safety Battery for Samsung Galaxy S21, Upgraded 4900mAh Durable High-Capacity Replacement with Repair Tool Kit, Compatible with SM-G991U SM-G991F

**Brand:** ruemiu
**Price:** 14846 Ft
**Availability:** ✅ In Stock

## Summary

> 🔋 Power up your Galaxy S21 with confidence and style!

## Quick Answers

- **What is this?** Battery for Samsung Galaxy S21, Upgraded 4900mAh Durable High-Capacity Replacement with Repair Tool Kit, Compatible with SM-G991U SM-G991F by ruemiu
- **How much does it cost?** 14846 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/672360842-battery-for-samsung-galaxy-s21-upgraded-4900mah-durable-high-capacity)

## Best For

- ruemiu enthusiasts

## Why This Product

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

## Key Features

- • **Safety You Can Trust:** Built-in smart IC chip guards against overheating, overcharging, and short circuits, certified by CE and RoHS for peace of mind.
- • **Seamless Compatibility:** Perfect 1:1 fit for Samsung Galaxy S21 models SM-G991U and SM-G991F ensures effortless installation and flawless performance.
- • **DIY Friendly Repair Kit:** Comes with a comprehensive toolkit and clear instructions—empowering you to replace your battery hassle-free and save on costly repairs.
- • **Power That Lasts All Day:** 4900mAh A+ grade cell delivers extended battery life to keep you connected longer without the mid-day panic.
- • **Stay Ahead, Stay Powered:** Upgrade your phone’s endurance with a premium battery that outperforms standard replacements—don’t get left behind with a dying device.

## Overview

This upgraded 4900mAh replacement battery for Samsung Galaxy S21 (SM-G991U/SM-G991F) features a high-capacity A+ grade cell, smart IC safety chip, and comes with a full repair toolkit for easy installation—ensuring longer device life and reliable performance.

## Description

Full description not available

## Features

- Durable & High Capacity: With a new A+ grade cell and 4900mAh capacity, this battery provides superior efficiency and long-lasting durability, outperforming other batteries in its class
- Compatible Models: The battery is designed for Samsung Galaxy S21 and fits models: SM-G991U SM-G991F
- Safety Protection: Equipped with smart IC chip for protection against overheating, overcharging, and short circuits. CE, RoHS certified for your peace of mind
- 1:1 Exact Fit: Designed for a perfect 1:1 fit, this battery replacement guarantees an exact match, ensuring smooth installation and optimal performance for your device
- What You Get: Includes the battery for Samsung Galaxy S21, instruction manual, repair tools, and dedicated customer support—everything you need for a hassle-free installation

## Product Details

- **Number of Batteries:** 1 Lithium Polymer batteries required.
- **Brand:** RUEMIU
- **Battery Cell Composition:** Lithium Polymer
- **Battery Capacity:** 4900 Milliamp Hours
- **Recommended Uses For Product:** Phone

## Images

![Battery for Samsung Galaxy S21, Upgraded 4900mAh Durable High-Capacity Replacement with Repair Tool Kit, Compatible with SM-G991U SM-G991F - Image 1](https://m.media-amazon.com/images/I/71Jgt4si7sL.jpg)
![Battery for Samsung Galaxy S21, Upgraded 4900mAh Durable High-Capacity Replacement with Repair Tool Kit, Compatible with SM-G991U SM-G991F - Image 2](https://m.media-amazon.com/images/I/71LDrbyIg5L.jpg)
![Battery for Samsung Galaxy S21, Upgraded 4900mAh Durable High-Capacity Replacement with Repair Tool Kit, Compatible with SM-G991U SM-G991F - Image 3](https://m.media-amazon.com/images/I/710gQOygEIL.jpg)
![Battery for Samsung Galaxy S21, Upgraded 4900mAh Durable High-Capacity Replacement with Repair Tool Kit, Compatible with SM-G991U SM-G991F - Image 4](https://m.media-amazon.com/images/I/71PtcpZPgKL.jpg)
![Battery for Samsung Galaxy S21, Upgraded 4900mAh Durable High-Capacity Replacement with Repair Tool Kit, Compatible with SM-G991U SM-G991F - Image 5](https://m.media-amazon.com/images/I/71VT1xLem1L.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Samsung s21 5g battery
*by T***B on August 10, 2025*

Great item for a great price! Arrived on time. Easy installation. Works great. Comes with everything you need. Longer battery life

### ⭐ Good if you just need the phone to get data out of it not to Replace old battery
*by T***R on August 26, 2025*

Has been less than 30 days and battery has already stopped holding a charge

### ⭐⭐⭐⭐⭐ Hidden gem
*by S***Y on July 27, 2025*

This was a hidden gem. I don’t find myself needng to replace mobile phone batteries very often, so I didn’t have all the needed tools for a DIY. This kit came with everything needed, most of which are reusable. Worked as it was designed, only $15, above and beyond

## Frequently Bought Together

- RUEMIU 4900mAh Battery for Samsung Galaxy S21,Upgraded High Capacity fit for S21 5G Model SM-G991U/U1/B/W/N/Q with Complete Repair Tool Kits
- Dock Connector for Samsung Galaxy S21 5G Charging Port Flex Cable Replacement for Samsung S21 5G G991U/G991W USB Charger Dock Board Connector with Tools (Black)

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**Shop now:** [https://www.desertcart.hu/products/672360842-battery-for-samsung-galaxy-s21-upgraded-4900mah-durable-high-capacity](https://www.desertcart.hu/products/672360842-battery-for-samsung-galaxy-s21-upgraded-4900mah-durable-high-capacity)

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*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-03-07*