---
product_id: 382837802
title: "EEMB3.7V Li-ion 502030 Battery 250mAh Lipo Battery Rechargeable Lithium Polymer ion Battery Pack with JST Connector (10) Make Sure Device Polarity Matches with Battery Before Purchase!"
brand: "eemb"
price: "€ 178.90"
currency: EUR
in_stock: false
reviews_count: 8
url: https://www.desertcart.hr/products/382837802-eemb3-7v-li-ion-502030-battery-250mah-lipo-battery-rechargeable
store_origin: HR
region: Croatia
---

# 250mAh Capacity Boost 3.7V Voltage Power Multi-layer Safety PCM EEMB3.7V Li-ion 502030 Battery 250mAh Lipo Battery Rechargeable Lithium Polymer ion Battery Pack with JST Connector (10) Make Sure Device Polarity Matches with Battery Before Purchase!

**Brand:** eemb
**Price:** € 178.90
**Availability:** ❌ Out of Stock

## Summary

> 🔋 Power up smartly, stay connected effortlessly!

## Quick Answers

- **What is this?** EEMB3.7V Li-ion 502030 Battery 250mAh Lipo Battery Rechargeable Lithium Polymer ion Battery Pack with JST Connector (10) Make Sure Device Polarity Matches with Battery Before Purchase! by eemb
- **How much does it cost?** € 178.90 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/382837802-eemb3-7v-li-ion-502030-battery-250mah-lipo-battery-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

- • **Power That Lasts:** Reliable 250mAh capacity with long cycle life keeps your devices energized.
- • **Safety First, Always:** Built-in PCM protection guards against overcharge, short circuit & overheating.
- • **Featherlight & Compact:** Ultra-slim 20x32x5mm design fits seamlessly into your tech essentials.
- • **Versatile Compatibility:** Perfect for Bluetooth speakers, dash cams, smart home devices & more.
- • **Precision Fit, Zero Risk:** Confirm polarity & connector size to avoid device damage—no compromises.

## Overview

The EEMB 3.7V 250mAh Li-ion rechargeable battery pack offers a compact, lightweight design with advanced PCM safety features. Engineered for precision with JST connectors and strict polarity requirements, it delivers reliable power for a wide range of smart devices including Bluetooth speakers, dash cams, and health monitors. UL certified and backed by responsive manufacturer support, it’s the go-to choice for professionals demanding dependable, long-lasting energy solutions.

## Description

EEMB3.7V Li-ion 502030 Battery 250mAh Lipo Battery Rechargeable Lithium Polymer ion Battery Pack with JST Connector (10) Make Sure Device Polarity Matches with Battery Before Purchase!

## Features

- MUST CONFIRM 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: 250mAh, Min capacity: 230mAh; Weight: approximate 5g; Size: 20.5 x 32 x 5.3mm (WxLxH)
- CERTIFICATIONS—More than 400 EEMB batteries are UL certified. Search "MH20555" on UL for all EEMB UL certification information. MANUFACTURER DIRECT— Please contact us if you have any questions or concerns with the product via desertcart message. We will respond to you within 24 hours.
- RELIABLE PERFORMANCE—No leaking, excellent cost performance and long cycle life. PCM protection function: over charge, over discharge, over current, short circuit protection, over temperature protection. STORAGE—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. And store the battery in cool and dry place.
- APPLICATION—Suitable for bluetooth speaker, dash cam, keyboard and mouse, Wi-Fi enabled smart home systems, PDA and digital cameras, GPS, monitoring units, notebook computers, e-books, telematics, tracking devices, sleep management equipment, blood oxygen tracking equipment, pulse monitors.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Package Dimensions L x W x H | 15 x 10.5 x 4 centimetres |
| Package Weight | 0.1 Kilograms |
| Product Dimensions L x W x H | 20 x 32 x 5 millimetres |
| Brand | EEMB |
| Part number | LP502030 |
| Size | 10 |
| Guaranteed software updates until | unknown |

## Product Details

- **Number of batteries:** 10 Lithium Metal batteries required. (included)
- **Brand:** EEMB
- **Battery cell composition:** Polymer
- **Compatible phone models:** Attribute not applicable for product
- **Recommended uses for product:** MP3 Player, Bluetooth speaker, MecArmy SGN3 flashlight, E-Bike Display, GPS, Alesis Radio, Nextbase 512 dashcam, VXI Blue Parrott, Dashcam

## Images

![EEMB3.7V Li-ion 502030 Battery 250mAh Lipo Battery Rechargeable Lithium Polymer ion Battery Pack with JST Connector (10) Make Sure Device Polarity Matches with Battery Before Purchase! - Image 1](https://m.media-amazon.com/images/I/71VraF9CFNL.jpg)
![EEMB3.7V Li-ion 502030 Battery 250mAh Lipo Battery Rechargeable Lithium Polymer ion Battery Pack with JST Connector (10) Make Sure Device Polarity Matches with Battery Before Purchase! - Image 2](https://m.media-amazon.com/images/I/71YTMlvmTfL.jpg)
![EEMB3.7V Li-ion 502030 Battery 250mAh Lipo Battery Rechargeable Lithium Polymer ion Battery Pack with JST Connector (10) Make Sure Device Polarity Matches with Battery Before Purchase! - Image 3](https://m.media-amazon.com/images/I/612Bn6Ofk3L.jpg)
![EEMB3.7V Li-ion 502030 Battery 250mAh Lipo Battery Rechargeable Lithium Polymer ion Battery Pack with JST Connector (10) Make Sure Device Polarity Matches with Battery Before Purchase! - Image 4](https://m.media-amazon.com/images/I/71ZVPBH+WcL.jpg)
![EEMB3.7V Li-ion 502030 Battery 250mAh Lipo Battery Rechargeable Lithium Polymer ion Battery Pack with JST Connector (10) Make Sure Device Polarity Matches with Battery Before Purchase! - Image 5](https://m.media-amazon.com/images/I/61pq-ifAY-L.jpg)

## Available Options

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

## Questions & Answers

**Q: How do I recharge the battery?**
A: Be VERY careful with this type of battery! If you do get it wrong you will have a chemical fire on your hands, that won't go out until the reaction has finished. Otherwise, the unit it is intended for will correctly charge it when fitted.

**Q: will this battery fit a Nextbase 312G Dashcam.**
A: Yes - it works on our dashcam.  There is a Youtube video by someone who shows you how to do it.  You will need a soldering iron and solder and some micro screwdrivers to do the work.

**Q: Is this battery suited to a next base 522gw**
A: Hi  - not sure about it fitting a 522gw,  fitted to mine which is a 512gw and works perfectly.

**Q: I need a 7.4 v battery for my ebook and the exact replacement is not available in the uk. can i use 2 of these in series ? will it charge correctly ?**
A: Hi, this is a li-ion battery I don't think it is suitable for charging in serial.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Replacement battery for dash cam
*by A***R on 11 March 2025*

Bought for my dash cam, seems to be similar spec to the original. Works fine and fitted easily after cutting off the connector and soldering to the pcb. Easy replacement and the dash cam lives on…

### ⭐⭐⭐⭐⭐ Super battery
*by D***Y on 18 April 2025*

Ideal replacement for my dash cam

### ⭐⭐⭐⭐ Perfectly fits
*by C***. on 13 March 2025*

Purchased this to replace dead battery in (4**GW )dash cam, which was an easy job. Now re-soldered it as no connection for attached white push terminal. Now working fine but must remember to charge regularly

## Frequently Bought Together

- EEMB 10Pack Lithium Polymer Battery 3.7V 250mAh 502030 Lipo Rechargeable Battery Pack with Wire JST Connector for VXI Blue Parrott- Confirm Device & Connector Polarity Before Purchase
- uxcell PTFE Tubing 2mm ID x 3mm OD x 16ft PTFE Tube for PLA ABS Filament
- 6Pack USB Wall Charger, iGENJUN 2.4A Phone Charger Dual USB Port Cube Power Plug Adapter Fast Wall Chargers Block Compatible with iPhone 16/16 Pro/15/15 Pro, Samsung Galaxy, Pixel, LG, Android-White

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-11*