---
product_id: 313501981
title: "EEMB"
brand: "eemb"
price: "€ 47.43"
currency: EUR
in_stock: true
reviews_count: 13
category: "Eemb"
url: https://www.desertcart.nl/products/313501981-eemb
store_origin: NL
region: Netherlands
---

# 3.7V stable voltage 1100mAh high capacity JST connector precision EEMB

**Brand:** eemb
**Price:** € 47.43
**Availability:** ✅ In Stock

## Summary

> 🔋 Power your innovation with precision and peace of mind!

## Quick Answers

- **What is this?** EEMB by eemb
- **How much does it cost?** € 47.43 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/313501981-eemb)

## 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

- • **Built-In Safety:** PCM protection guards against overcharge, over-discharge, short circuit, and overcurrent for worry-free use.
- • **Power That Lasts:** 1100mAh capacity ensures extended device runtime without constant recharging.
- • **Certified Reliability:** UN 38.3 and UL certified for trusted quality and compliance in professional applications.
- • **Lightweight & Compact:** Slim 34.5 x 51 x 6.3mm design at just 22g fits seamlessly into your sleek tech projects.
- • **Plug & Play Precision:** JSH-PHR-02 JST connector with exact 2mm pole spacing guarantees perfect fit and polarity safety.

## Overview

The EEMB 4PACK Lithium Polymer Battery offers a reliable 3.7V, 1100mAh rechargeable power source with a compact form factor and JST connector designed for ESP32 boards, speakers, and IoT devices. Featuring advanced PCM safety protections and industry certifications, it delivers long-lasting, safe, and efficient energy for your cutting-edge projects.

## Description

Buy EEMB 4PACK Lithium Polymer Battery 3.7V 1100mAh 603449 Lipo Rechargeable Battery Pack with Wire JST Connector for ESP32 Development Board/Speaker- Confirm Device & Connector Polarity Before Purchase: 3.7V - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: good replacement battery. - I used this in a ultra-light flashlight I designed for my drone. I picked up some tiny single cell charger boards with built in low voltage cut-off to make a tiny battery pack. Worked like a champ!
Review: Last twice as long as original battery. - I swapped this battery in place of the OEM unit and I’m genuinely impressed — it works well, and it stays charged significantly longer than what I had before. The build feels solid, the voltage holds steady, and it gives me peace of mind that I won’t be scrambling for a recharge mid-use. If you’re looking for a dependable replacement that punches above its pricing tier, this one’s a great pick.

## Features

- Make Sure Device Polarity Matches with Battery Pack Connector Before Purchase-1.Battery Size; 2.Connector Model; 3.Connector Size; 4.Connector Polarity - This is not universal(It will cause a shortage if the polarity of the battery connector does not match your device.)
- Basic Info—Voltage: 3.7V; Typical capacity: 1100mAh, Min capacity: 1000mAh; Weight: approximate 22g; Size: 34.5 x 51 x 6.3mm (WxLxH). And the connector model of our battery is JSH-PHR-02. The distance between positive and negative poles is 2mm and the width of the whole plug is 5.8 mm.
- Reliable Performance—No leaking, excellent cost performance and long cycle life. PCM protection function: over charge, over discharge, over current, short circuit protection.
- Certifications—UN 38.3 compliant. More than 400 EEMB batteries are UL certified. Search "MH20555" on UL for all EEMB UL certification information. Quality Service— Please contact us if you have any questions or concerns with the product via desertcart message. If you have any questions or concerns regarding our products, please send us a message and we will get back to you promptly.
- Storage and Application—Keep the cells in 40%-60% charged state during long period storage. We recommend to charge the battery every 3 months after receipt of the battery and maintain the voltage 3.7-4.0V. Store battery in cool and dry place. Suitable for Bluetooth speaker, ESP32 Development Board，dash cam, keyboard and mouse, Wi-Fi smart home systems, PDA and digital cameras, GPS, monitoring units, e-books, tracking devices, blood oxygen tracking equipment, pulse monitors, wireless, IoT.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08VRYS8FT |
| Batteries | 4 Lithium Polymer batteries required. (included) |
| Best Sellers Rank | #84,113 in Health & Household ( See Top 100 in Health & Household ) #67 in 3. |
| Customer Reviews | 4.3 4.3 out of 5 stars (1,320) |
| Date First Available | November 25, 2019 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.774 ounces |
| Item model number | LP603449-PCM |
| Manufacturer | EEMB Co.,Ltd |
| Product Dimensions | 1.36 x 2.01 x 0.25 inches |

## Product Details

- **Battery Capacity:** 1100 Milliamp Hours
- **Battery Cell Composition:** Lithium Polymer
- **Brand:** EEMB
- **Number of Batteries:** 4 Lithium Polymer batteries required. (included)
- **Recommended Uses For Product:** GPS

## Images

![EEMB - Image 1](https://m.media-amazon.com/images/I/71UG9VdFXEL.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

### ⭐⭐⭐⭐⭐ good replacement battery.
*by W***G on December 24, 2025*

I used this in a ultra-light flashlight I designed for my drone. I picked up some tiny single cell charger boards with built in low voltage cut-off to make a tiny battery pack. Worked like a champ!

### ⭐⭐⭐⭐⭐ Last twice as long as original battery.
*by T***L on October 30, 2025*

I swapped this battery in place of the OEM unit and I’m genuinely impressed — it works well, and it stays charged significantly longer than what I had before. The build feels solid, the voltage holds steady, and it gives me peace of mind that I won’t be scrambling for a recharge mid-use. If you’re looking for a dependable replacement that punches above its pricing tier, this one’s a great pick.

### ⭐⭐⭐⭐⭐ Actually 1100mAh as it is rated!
*by P***Y on May 2, 2023*

I used this to replace a battery in my Sony Dualshock 3 controller for my PS3. I needed a battery and didnt want the standard size official Sony battery as theyre very small, in the order of 500 mAh or so. I installed this and it fired right up even without charging it which is a good sign. It takes twice as long to charge the controller now, but it lasts seemingly forever now. ive used it daily for almost 2 weeks now and it still says I have 2/3 charge. I would highly recommend this battery to anyone looking to do the same mod. It fit in the old battery spot perfectly fine, but I did place a bit of foam between the motherboard and battery to keep the solder points from poking the battery body.

## Frequently Bought Together

- EEMB 4PACK Lithium Polymer Battery 3.7V 1100mAh 603449 Lipo Rechargeable Battery Pack with Wire JST Connector for Speaker and Wireless Device- Confirm Device & Connector Polarity Before Purchase
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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-02-20*