---
product_id: 673853335
title: "New 0 Cycled Li-ion Battery for Galaxy S21 5G SM-G991U/U1/B/W Series, Internal Replacement Battery Compatible with Galaxy S21 5G, Includes Instruction & Tools"
brand: "maxsharks"
price: "5308 kr"
currency: ISK
in_stock: true
url: https://www.desertcart.is/products/673853335-new-0-cycled-li-ion-battery-for-galaxy-s21-5g
store_origin: IS
region: Iceland
---

# Perfect Galaxy S21 5G fit 0 cycled Li-ion tech Pro-grade toolkit included New 0 Cycled Li-ion Battery for Galaxy S21 5G SM-G991U/U1/B/W Series, Internal Replacement Battery Compatible with Galaxy S21 5G, Includes Instruction & Tools

**Brand:** maxsharks
**Price:** 5308 kr
**Availability:** ✅ In Stock

## Summary

> 🔋 Power up your Galaxy S21 5G like a pro — don’t get left behind!

## Quick Answers

- **What is this?** New 0 Cycled Li-ion Battery for Galaxy S21 5G SM-G991U/U1/B/W Series, Internal Replacement Battery Compatible with Galaxy S21 5G, Includes Instruction & Tools by maxsharks
- **How much does it cost?** 5308 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/673853335-new-0-cycled-li-ion-battery-for-galaxy-s21-5g)

## Best For

- maxsharks enthusiasts

## Why This Product

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

## Key Features

- • **Optimize Battery Life:** Recommended 3 full charge-discharge cycles for perfect calibration and extended durability.
- • **Seamless Installation:** Pre-installed adhesive and extra back cover adhesive guarantee a secure, hassle-free fit.
- • **Zero Cycle, Maximum Power:** Brand new Li-ion battery ensures peak performance and longevity.
- • **DIY Repair Made Effortless:** Comes with a full professional toolkit and step-by-step guide to empower your fix.
- • **Tailored for Galaxy S21 5G:** Precision compatibility with SM-G991U/U1/B/W series for flawless integration.

## Overview

This New 0 Cycled Li-ion Replacement Battery is engineered specifically for Galaxy S21 5G SM-G991 series models, delivering fresh, reliable power. The kit includes a professional-grade toolkit, detailed repair instructions, and pre-installed adhesive for a smooth, confident DIY battery swap that restores your phone’s peak performance.

## Description

MAXSHARKS New 0 Cycled Li-ion Battery for Galaxy S21 5G SM-G991U/U1/B/W Series, Internal Replacement Battery Compatible with Galaxy S21 5G, Includes Instruction & Tools

## Features

- Compatible Phone Model: This battery kit is specifically designed for Galaxy S21 5G SM-G991B, SM-G991B/DS, SM-G991U, SM-G991U1, SM-G991W series, please double confirm your phone model before purchasing
- Important: To achieve optimal calibration, a new battery should undergo at least three full charge and discharge cycles.
- Original back cover adhesive included: The battery comes with a pre-installed adhesive—just peel off the protective film and firmly press the battery into place for straightforward installation. The package also contains a pre-cut adhesive for the back cover, enhancing convenience.
- Comprehensive repair guide: A detailed repair guide is included in the package, providing you with the information needed to confidently carry out the repair on your own.
- Complete professional toolkit: This kit includes a carefully selected range of tools necessary for the repair process, ensuring a professional and safe experience. Designed for ease of use, it gives you the confidence to complete your repair efficiently.

## Product Details

- **Number of Batteries:** 1 Lithium Polymer batteries required. (included)
- **Brand:** MAXSHARKS
- **Battery Cell Composition:** Lithium Ion
- **Recommended Uses For Product:** Phone
- **Unit Count:** 1.0 Count

## Images

![New 0 Cycled Li-ion Battery for Galaxy S21 5G SM-G991U/U1/B/W Series, Internal Replacement Battery Compatible with Galaxy S21 5G, Includes Instruction & Tools - Image 1](https://m.media-amazon.com/images/I/81Gj6RUOQ0L.jpg)
![New 0 Cycled Li-ion Battery for Galaxy S21 5G SM-G991U/U1/B/W Series, Internal Replacement Battery Compatible with Galaxy S21 5G, Includes Instruction & Tools - Image 2](https://m.media-amazon.com/images/I/71UfuVAT9KL.jpg)
![New 0 Cycled Li-ion Battery for Galaxy S21 5G SM-G991U/U1/B/W Series, Internal Replacement Battery Compatible with Galaxy S21 5G, Includes Instruction & Tools - Image 3](https://m.media-amazon.com/images/I/71E6G-bhQSL.jpg)
![New 0 Cycled Li-ion Battery for Galaxy S21 5G SM-G991U/U1/B/W Series, Internal Replacement Battery Compatible with Galaxy S21 5G, Includes Instruction & Tools - Image 4](https://m.media-amazon.com/images/I/71sOHW875OL.jpg)
![New 0 Cycled Li-ion Battery for Galaxy S21 5G SM-G991U/U1/B/W Series, Internal Replacement Battery Compatible with Galaxy S21 5G, Includes Instruction & Tools - Image 5](https://m.media-amazon.com/images/I/81V7Z5k29vL.jpg)

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**Shop now:** [https://www.desertcart.is/products/673853335-new-0-cycled-li-ion-battery-for-galaxy-s21-5g](https://www.desertcart.is/products/673853335-new-0-cycled-li-ion-battery-for-galaxy-s21-5g)

---

*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-01-25*