---
product_id: 515207089
title: "Replacement Battery for Galaxy Watch 3 (45mm), EB-BR840ABY Battery Compatible with Samsung Galaxy Watch 3 45mm SM-R840 SM-R845, with Repair Tools & Instruction"
brand: "maxsharks"
price: "KD 8.43"
currency: KWD
in_stock: true
reviews_count: 8
url: https://www.desertcart.com.kw/products/515207089-replacement-battery-for-galaxy-watch-3-45mm-eb-br840aby-battery
store_origin: KW
region: Kuwait
---

# Step-by-step detailed repair guide Zero-cycle original Li-Po cell Complete professional repair toolkit Replacement Battery for Galaxy Watch 3 (45mm), EB-BR840ABY Battery Compatible with Samsung Galaxy Watch 3 45mm SM-R840 SM-R845, with Repair Tools & Instruction

**Brand:** maxsharks
**Price:** KD 8.43
**Availability:** ✅ In Stock

## Summary

> 🔋 Recharge your Galaxy Watch 3 with pro-level ease and never miss a beat!

## Quick Answers

- **What is this?** Replacement Battery for Galaxy Watch 3 (45mm), EB-BR840ABY Battery Compatible with Samsung Galaxy Watch 3 45mm SM-R840 SM-R845, with Repair Tools & Instruction by maxsharks
- **How much does it cost?** KD 8.43 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/515207089-replacement-battery-for-galaxy-watch-3-45mm-eb-br840aby-battery)

## 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

- • **Tailored Fit:** Specifically engineered for Samsung Galaxy Watch 3 45mm SM-R840/SM-R845 models
- • **DIY Confidence:** Includes a professional-grade toolkit for a safe, hassle-free battery replacement
- • **Secure Delivery:** Packaged with anti-static foam and hard plastic case to guarantee safe arrival
- • **Guided Precision:** Comes with a detailed repair manual to walk you through every step
- • **Power Up Like New:** Brand new zero-cycle Li-Po battery ensures peak performance and extended life

## Overview

This replacement battery kit for the Samsung Galaxy Watch 3 45mm features a brand new zero-cycle Li-Po cell tested to UL2054 standards, ensuring long-lasting, reliable power. It includes a professional repair toolkit and a detailed instruction guide, empowering you to perform a safe and efficient battery swap. Packaged securely to protect during shipping, this kit is tailored specifically for SM-R840 and SM-R845 models.

## Description

MAXSHARKS Replacement Battery for Galaxy Watch 3 (45mm) , EB-BR840ABY Battery Compatible with Samsung Galaxy Watch 3 45mm SM-R840 SM-R845, with Repair Tools & Instruction

## Features

- Compatible Smartwatch Model: This battery kit is specifically designed for Samsung Galaxy Watch 3 45mm (with model SM-R840 SM-R845 series), please double confirm your smartwatch model before purchasing
- Quality Li-Po Cell: Built with brand new zero cycle original Li-Po cell, manufactured and tested under UL2054 test standards to ensure the best performance and long-lasting battery life. NOTE: A new battery requires at least three full charge and discharge cycles to properly calibrate the battery management system
- Detailed Repair Guide: The package includes a complete and detailed repair guide, allowing you to easily handle the repair yourself with convenience and peace of mind
- Professional Repair Toolkit: Carefully selected by our expert repair team, this kit includes every tool you need for the repair process. It's professional, safe, and easy to use, giving you the confidence to complete your repair quickly and efficiently
- Extra Protection: Each smartwatch battery is packaged in a custom hard plastic case with anti-static foam inside, providing effective protection against bumps and pressure during shipping, ensuring your item arrives safely

## Product Details

- **Number of Batteries:** 1 Lithium Ion batteries required. (included)
- **Brand:** MAXSHARKS
- **Battery Cell Composition:** Lithium Polymer
- **Battery Capacity:** 3 Volts
- **Recommended Uses For Product:** Watch

## Images

![Replacement Battery for Galaxy Watch 3 (45mm), EB-BR840ABY Battery Compatible with Samsung Galaxy Watch 3 45mm SM-R840 SM-R845, with Repair Tools & Instruction - Image 1](https://m.media-amazon.com/images/I/81da4z-C-hL.jpg)
![Replacement Battery for Galaxy Watch 3 (45mm), EB-BR840ABY Battery Compatible with Samsung Galaxy Watch 3 45mm SM-R840 SM-R845, with Repair Tools & Instruction - Image 2](https://m.media-amazon.com/images/I/71PvoCZbVnL.jpg)
![Replacement Battery for Galaxy Watch 3 (45mm), EB-BR840ABY Battery Compatible with Samsung Galaxy Watch 3 45mm SM-R840 SM-R845, with Repair Tools & Instruction - Image 3](https://m.media-amazon.com/images/I/61VGMw7bLSL.jpg)
![Replacement Battery for Galaxy Watch 3 (45mm), EB-BR840ABY Battery Compatible with Samsung Galaxy Watch 3 45mm SM-R840 SM-R845, with Repair Tools & Instruction - Image 4](https://m.media-amazon.com/images/I/71fGYNXUJRL.jpg)
![Replacement Battery for Galaxy Watch 3 (45mm), EB-BR840ABY Battery Compatible with Samsung Galaxy Watch 3 45mm SM-R840 SM-R845, with Repair Tools & Instruction - Image 5](https://m.media-amazon.com/images/I/71NRFNzCAjL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ You need this  kit for the 'Y' screwdriver!
*by R***B on June 29, 2025*

Why did you pick this product vs others?:Good kit - the watch back has 'Y' screws instead of Phillip's heads. The instructions are crappy - watch YouTube's Samsung Watch 3 battery replacement by Joe's Gaming and Electronics...

### ⭐ Battery life is horrendous
*by G***P on June 16, 2025*

The battery worked but the battery life is trash. If you are expecting this to replace your stock watch battery you will be severely disappointed. Without even playing on the watch or doing anything with it besides just wearing it, it wont even last 24 hours. I put it on in the morning, fully charged, and before I go to bed at night it is completely dead. This is on day 1 so hasnt even had a chance to degrade. Not worth buying.

### ⭐⭐⭐⭐⭐ Better than advertised
*by J***R on September 7, 2024*

I purchased a Samusing watch 3 about 2 years ago and completely forgot about it. Never removed from the packaging. When I opened and tried to charge it, it wasn't working. I called numerous places to try and get it looked at. After failing to find someone I decided to do it myself. The tool kit was delivered. Everything went without issues. The instructions are excellent. The tools are good unlike what other reviews state. My watch is in working condition and taking a charge. This is a great value for your money if you feel confident on doing it yourself. Highly recommend.

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**Shop now:** [https://www.desertcart.com.kw/products/515207089-replacement-battery-for-galaxy-watch-3-45mm-eb-br840aby-battery](https://www.desertcart.com.kw/products/515207089-replacement-battery-for-galaxy-watch-3-45mm-eb-br840aby-battery)

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*Product available on Desertcart Kuwait*
*Store origin: KW*
*Last updated: 2026-01-29*