---
product_id: 732781005
title: "1 X EEMB 3.7v Rechargeable Lithium-Ion Battery Lithium-Polymer Battery Rechargeable Battery 1100 mAh 603449 Lipo Rechargeable Battery Pack with JST Connector - Check Device and Connector Polarity"
brand: "eemb"
price: "€ 1.25"
currency: EUR
in_stock: true
reviews_count: 13
category: "Eemb"
url: https://www.desertcart.pt/products/732781005-1-x-eemb-3-7v-rechargeable-lithium-ion-battery-lithium
store_origin: PT
region: Portugal
---

# 3.7V nominal voltage for stable output 1100mAh high-capacity power Built-in PCM protection circuit 1 X EEMB 3.7v Rechargeable Lithium-Ion Battery Lithium-Polymer Battery Rechargeable Battery 1100 mAh 603449 Lipo Rechargeable Battery Pack with JST Connector - Check Device and Connector Polarity

**Brand:** eemb
**Price:** € 1.25
**Availability:** ✅ In Stock

## Summary

> 🔋 Power up your gear with confidence—never miss a beat or a moment!

## Quick Answers

- **What is this?** 1 X EEMB 3.7v Rechargeable Lithium-Ion Battery Lithium-Polymer Battery Rechargeable Battery 1100 mAh 603449 Lipo Rechargeable Battery Pack with JST Connector - Check Device and Connector Polarity by eemb
- **How much does it cost?** € 1.25 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/732781005-1-x-eemb-3-7v-rechargeable-lithium-ion-battery-lithium)

## Best For

- eemb enthusiasts

## Why This Product

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

## Key Features

- • **Safety-First Design:** Advanced PCM protection guards against overcharge, short-circuit, and overheating.
- • **Reliable Power Boost:** 1100mAh capacity fuels your devices longer without compromise.
- • **Compact & Lightweight:** Slim 34.5x50x6.3mm profile at just 22g fits discreetly in your tech essentials.
- • **Precision Fit Connector:** JST connector ensures seamless, secure device compatibility—no guesswork.
- • **Certified Quality Assurance:** UN 38.3 & UL certified for peace of mind in every charge cycle.

## Overview

This EEMB 3.7V 1100mAh rechargeable lithium-polymer battery pack features a JST connector tailored for precise polarity matching, ensuring safe and reliable power delivery. Compact and lightweight, it includes a PCM protection circuit to prevent overcharge, over-discharge, short-circuit, and overheating. Certified to UN 38.3 and UL standards, it’s ideal for Bluetooth headsets, dash cams, and other portable electronics demanding consistent, long-lasting energy.

## Description

Keep out of reach of children to avoid infants swallowing. Do not place in high temperature or near fire. Do not throw batteries or put them in a humid environment. Please do not contact the positive and negative poles of the battery with the metal. Please keep the battery capacity at least 50% if you store the battery for a long time. Please charge and discharge about 0.2C once every three months. If the battery voltage is low, please charge it until it is 3.7-4V.

Review: ソニーのサラウンドヘッドホン MDR-DS7500のバッテリーを交換するために注文。 純正よりは容量(1260mah)減るけど83%程度だし、使用時間よりバッテリー状態を危惧してた。 使用にも充電にも今のところ問題ない。 ちょっと様子見で、ほかの２台分も交換用バッテリーをリピートしようと思う。 5月13日追記 満充電を試みるも急発熱して、充電異常らしき不具合発生。 充電池内部の活性化が足りないのかもだけど、なんだか不安に感じる。 5月14日追記 やはり熱問題なのか、途中で充電が止まってしまう。 適合しないのか、充電しようが合わないのかはわからないので もう少し様子見ながら今後を決めたい。
Review: 長く使ってました、同じ品物が、少し劣化が目立ってきましたので、交換しました、長く持つようになりました、満足です

## Features

- Before purchasing, please ensure that the battery pack connector and the device polarity match - 1. Battery size; 2. Connector model; 3. Connector size; 4. Connector polarity - This is not universal!!! (If the polarity of the battery connector is not matched with the device, it may cause a short circuit )
- Basic information - 1.1Ah, nominal voltage 3.7V Weight 22g It comes with a protection circuit to prevent overcharging and overcurrent Battery size: 34.5 x 50 x 6.3 mm (WxLxH), lead wire length 50±3 mm. Please refer to the image for the design drawing
- Reliable performance—no leakage, excellent cost-performance, and long cycle life PCM Protection Function: Over-charge, over-discharge, over-current, short-circuit protection, and over-heat protection
- Certified — Compliant with UN 38.3 More than 400 EEMB batteries are UL certified For all EEMB UL certification information, search for "MH20555" on UL We will respond within 24 hours
- Storage and Application - During long-term storage, keep the cell at a charge level of 40% to 60% It is recommended to charge the battery and maintain a voltage of 3.7 ~ 4.0V every three months after receiving the battery Store the battery in a cool, dry place Bluetooth speaker, dash cam

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08FD39Y5R |
| Amazon Bestseller | #28,449 in Electronics ( See Top 100 in Electronics ) #207 in Rechargeable Household Batteries |
| Batteries Included | Yes |
| Batteries Required | Yes |
| Brand | EEMB |
| Compatible Devices | Bluetooth Headset, Dash Cam |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,282) |
| Date First Available | September 28, 2022 |
| Item Model Number | LP603449-PCM |
| Item Weight | 0.03 Kilograms |
| Item model number | LP603449-PCM |
| Manufacturer | EEMB Co.,Ltd |
| Product Dimensions | 3.45 x 5.1 x 0.63 cm; 30 g |
| Size | 1 |
| Special Features | Includes JST connector, Lipo rechargeable battery pack |

## Product Details

- **Battery Capacity:** 1100 Milliamp Hours
- **Battery Cell Composition:** Lithium Ion
- **Brand:** EEMB
- **Number of Batteries:** 1 Lithium Polymer batteries required. (included)
- **Recommended Uses For Product:** Camera, GPS, Tablet, Watch

## Images

![1 X EEMB 3.7v Rechargeable Lithium-Ion Battery Lithium-Polymer Battery Rechargeable Battery 1100 mAh 603449 Lipo Rechargeable Battery Pack with JST Connector - Check Device and Connector Polarity - Image 1](https://m.media-amazon.com/images/I/61G3iBkm0AL.jpg)
![1 X EEMB 3.7v Rechargeable Lithium-Ion Battery Lithium-Polymer Battery Rechargeable Battery 1100 mAh 603449 Lipo Rechargeable Battery Pack with JST Connector - Check Device and Connector Polarity - Image 2](https://m.media-amazon.com/images/I/61O1OF1w8ZL.jpg)
![1 X EEMB 3.7v Rechargeable Lithium-Ion Battery Lithium-Polymer Battery Rechargeable Battery 1100 mAh 603449 Lipo Rechargeable Battery Pack with JST Connector - Check Device and Connector Polarity - Image 3](https://m.media-amazon.com/images/I/61lymxlfKTL.jpg)
![1 X EEMB 3.7v Rechargeable Lithium-Ion Battery Lithium-Polymer Battery Rechargeable Battery 1100 mAh 603449 Lipo Rechargeable Battery Pack with JST Connector - Check Device and Connector Polarity - Image 4](https://m.media-amazon.com/images/I/61m55QL3-VL.jpg)
![1 X EEMB 3.7v Rechargeable Lithium-Ion Battery Lithium-Polymer Battery Rechargeable Battery 1100 mAh 603449 Lipo Rechargeable Battery Pack with JST Connector - Check Device and Connector Polarity - Image 5](https://m.media-amazon.com/images/I/71ZVPBH+WcL.jpg)

## Available Options

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

## Questions & Answers

**Q: The box clearly states non rechargeable, are these actually rechargeable?!?!**
A: I didn’t pay attention to my box but yes they are rechargeable.

**Q: what's the shut off voltage?**
A: 4.2 volts

**Q: is the polarity of the connector reversed?**
A: The polarity of the connector battery side is as you see it.
Red(+) Black(-).... However... I have seen instances were the polarity of the pins on the equipment side has been reversed.
A pain.  You will have to verify the circuit diagram that you are connecting the battery to.

**Q: Can it be used on 3 wire equipment? how to connect if yes? i am trying to use it on logitech mx master mouse.**
A: 3 wire Lipo's have balancing tech/ability.  These two wire batteries are not setup for that.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by フ***ト on May 9, 2025*

ソニーのサラウンドヘッドホン MDR-DS7500のバッテリーを交換するために注文。 純正よりは容量(1260mah)減るけど83%程度だし、使用時間よりバッテリー状態を危惧してた。 使用にも充電にも今のところ問題ない。 ちょっと様子見で、ほかの２台分も交換用バッテリーをリピートしようと思う。 5月13日追記 満充電を試みるも急発熱して、充電異常らしき不具合発生。 充電池内部の活性化が足りないのかもだけど、なんだか不安に感じる。 5月14日追記 やはり熱問題なのか、途中で充電が止まってしまう。 適合しないのか、充電しようが合わないのかはわからないので もう少し様子見ながら今後を決めたい。

### ⭐⭐⭐⭐⭐ Review
*by A***ー on March 21, 2025*

長く使ってました、同じ品物が、少し劣化が目立ってきましたので、交換しました、長く持つようになりました、満足です

### ⭐⭐⭐⭐ Review
*by A***ー on September 22, 2025*

自分はドラレコの電池交換用に買いましたが厚みが割と有りますのでケースが閉じなくなりました。

## Frequently Bought Together

- EEMB Lithium Polymer Battery 3.7V 1100mAh 603449 Lipo Rechargeable Battery with Wire JST 2.0mm Connector for Speaker and Wireless Device- Confirm Device & Connector Polarity Before Purchase
- HiLetgo 3pcs TP4056 Type-c USB 5V 1A 18650 Lithium Battery Charger Module Charging Board with Dual Protection Functions
- elechawk 10pcs Upgraded Tiny Whoop JST-PH 2.0 Male and Female Connector Cable for Battery JJRC H36 H67 Blade Inductrix E010 E013

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.pt/products/732781005-1-x-eemb-3-7v-rechargeable-lithium-ion-battery-lithium](https://www.desertcart.pt/products/732781005-1-x-eemb-3-7v-rechargeable-lithium-ion-battery-lithium)

---

*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-02-01*