---
product_id: 380325268
title: "EEMB Lithium Polymer Battery 3.7V 1800mAh 103450 Lipo Rechargeable Battery Pack with 2 Wires JST 2.0mm Connector for Speaker and Wireless Device- Confirm Device & Connector Polarity Before Purchase"
brand: "eemb"
price: "¥3125"
currency: JPY
in_stock: true
reviews_count: 13
category: "Eemb"
url: https://www.desertcart.jp/products/380325268-eemb-lithium-polymer-battery-3-7v-1800mah-103450-lipo-rechargeable
store_origin: JP
region: Japan
---

# 1800mAh long-lasting capacity 3.7V high-voltage power JST 2.0mm precision connector EEMB Lithium Polymer Battery 3.7V 1800mAh 103450 Lipo Rechargeable Battery Pack with 2 Wires JST 2.0mm Connector for Speaker and Wireless Device- Confirm Device & Connector Polarity Before Purchase

**Brand:** eemb
**Price:** ¥3125
**Availability:** ✅ In Stock

## Summary

> 🔋 Power up your tech game—never settle for less!

## Quick Answers

- **What is this?** EEMB Lithium Polymer Battery 3.7V 1800mAh 103450 Lipo Rechargeable Battery Pack with 2 Wires JST 2.0mm Connector for Speaker and Wireless Device- Confirm Device & Connector Polarity Before Purchase by eemb
- **How much does it cost?** ¥3125 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/380325268-eemb-lithium-polymer-battery-3-7v-1800mah-103450-lipo-rechargeable)

## 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

- • **Plug & Play Precision:** JST 2.0mm connector with exact polarity prevents costly short circuits—know before you buy!
- • **Stay Unplugged Longer:** Generous 1800mAh capacity keeps your Bluetooth speakers and smart devices running all day.
- • **Built to Last & Protect:** Advanced PCM protection guards against overcharge, over-discharge, and short circuits for peace of mind.
- • **Certified Quality You Can Trust:** UN 38.3 and UL certified battery meets rigorous safety and performance standards.
- • **Power Your Devices with Confidence:** Reliable 3.7V voltage ensures consistent performance for your wireless gadgets.

## Overview

The EEMB Lithium Polymer Battery is a 3.7V, 1800mAh rechargeable power source featuring a precise JST 2.0mm connector designed for wireless devices like Bluetooth speakers and smart home gadgets. Engineered with PCM protection and certified by UN 38.3 and UL standards, it delivers reliable, safe, and long-lasting energy. Perfect for professionals who demand dependable performance and want to avoid compatibility pitfalls—just confirm polarity before purchase to ensure seamless integration.

## Description

desertcart.com: EEMB Lithium Polymer Battery 3.7V 1800mAh 103450 Lipo Rechargeable Battery Pack with 2 Wires JST 2.0mm Connector for Speaker and Wireless Device- Confirm Device & Connector Polarity Before Purchase : Health & Household

Review: good exchange for another LiPO of the same ratings - The battery works fine and the polarity is correct, as it seems some others have noted a polarity problem. The plug on this size battery does not appear to be standardized so my light would not accept it. So I had to cut the leads on the old plug and solder them to the new battery. It then works and fits fine. To be fair, it has a big warning on the description to check the shape and size of the plug you want. But I could not find another battery with a proper connector. So, if you don't do much soldering, be sure the plug will fit your project.
Review: Foot and works great - Used to replace the swollen battery in my headlamp. It was the right voltage and current but the positive and negative were reversed in the plug. They were easily changed to the correct positions and then it plugged right in and works great.

## 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: 1800mAh, Min capacity: 1580mAh; Weight: approximate 36g; Size: 11 x 34.5 x 52mm(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.
- Certification—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. We will respond to you within 24 hours.
- Storage & 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, 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 | B09DPL8RZH |
| Batteries | 1 Lithium Polymer batteries required. (included) |
| Best Sellers Rank | #154,365 in Health & Household ( See Top 100 in Health & Household ) #202 in 3.7V Batteries |
| Customer Reviews | 4.4 4.4 out of 5 stars (178) |
| Date First Available | August 26, 2021 |
| Item Weight | 1.09 ounces |
| Item model number | LP103450-PCM |
| Manufacturer | EEMB Co.,Ltd |
| Product Dimensions | 2.36 x 0.71 x 4.92 inches |

## Product Details

- **Battery Capacity:** 1800
- **Battery Cell Composition:** Lithium Polymer
- **Brand:** EEMB
- **Number of Batteries:** 1 Lithium Polymer batteries required. (included)
- **Recommended Uses For Product:** Clock

## Images

![EEMB Lithium Polymer Battery 3.7V 1800mAh 103450 Lipo Rechargeable Battery Pack with 2 Wires JST 2.0mm Connector for Speaker and Wireless Device- Confirm Device & Connector Polarity Before Purchase - Image 1](https://m.media-amazon.com/images/I/61ESVfZstVL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ good exchange for another LiPO of the same ratings
*by J***L on August 21, 2025*

The battery works fine and the polarity is correct, as it seems some others have noted a polarity problem. The plug on this size battery does not appear to be standardized so my light would not accept it. So I had to cut the leads on the old plug and solder them to the new battery. It then works and fits fine. To be fair, it has a big warning on the description to check the shape and size of the plug you want. But I could not find another battery with a proper connector. So, if you don't do much soldering, be sure the plug will fit your project.

### ⭐⭐⭐⭐⭐ Foot and works great
*by M***M on July 15, 2025*

Used to replace the swollen battery in my headlamp. It was the right voltage and current but the positive and negative were reversed in the plug. They were easily changed to the correct positions and then it plugged right in and works great.

### ⭐⭐⭐⭐⭐ seems they corrected the polarity issues, I got the 1800mah lp103450 lipo battery, it's perfect!
*by B***T on April 28, 2023*

The EEMB battery came in perfect condition, looked very fresh and well made, it took a charge perfectly, I used a lab bench linear powersupply, set it to, 4.2 volts, limited it to 1 Amp of current and progressively over the course of charging the onboard protection module slowly tapered off the current as it should, it came with a 3.6 voltage charge and I topped it off to 4.2 volts, it worked perfectly. I'm using it to power a Retekess Pr-15 pocket radio, I do wish I ordered the 1000 mah version since it would've been smaller, but it's fine, ill be cutting out the battery compartment and fit the lipo battery inside, the chip inside there can handle 4.5 volts, so it should be fine. After I spray out the volume control, headphone jack and volume/power switch with deoxit d5 contact cleaner and lube, I'll also be recapping the radio "there are only two Electrolytic's inside, but they're junk, so they'll be replaced with Panasonic KS-A series ECE-A1AKS221 and ECE-A1AKS101 they'll be ordered from mouser electronics as you really can't trust ebay or amazon for good quality official parts like that, perhaps I'll also put a Visaton K 50 FL - 16 ohm 2" mylar 1w rms speaker also available at mouser inside there too. Looking at the frequency response which was very nice and generally having good experience with visatons woofers and subwoofers, tweeters and other full rage speakers in the past, I could only imagine how clear it would be. Would just have to expand the speaker hole. To charge this lilo from 5v USB power, I picked these up 10Gtek# 1A 5V 18650 Lithium Battery Type-c USB TP4056, Charging Board with Protection Charger Module, Pack of 3 https://www.amazon.com/dp/B09KRK4MJR?ref=ppx_yo2ov_dt_b_product_details&th=1 just clip off the crappy jst connector and solder the batteries wires where they have to go and you're good.

## Frequently Bought Together

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-03*