---
product_id: 401008109
title: "Lithium Polymer battery 3.7V 250mAh 502030 Lipo Rechargeable Battery Pack with wire JST Connector for VXI Blue Parrott and MP3 MP4 Speaker-confirm device & connector polarity before purchase(4)"
brand: "eemb"
price: "$68"
currency: NZD
in_stock: true
reviews_count: 13
category: "Eemb"
url: https://www.desertcart.nz/products/401008109-lithium-polymer-battery-3-7v-250mah-502030-lipo-rechargeable-battery
store_origin: NZ
region: New Zealand
---

# 250mAh Capacity 3.7V Voltage Multi-layer PCM Protection Lithium Polymer battery 3.7V 250mAh 502030 Lipo Rechargeable Battery Pack with wire JST Connector for VXI Blue Parrott and MP3 MP4 Speaker-confirm device & connector polarity before purchase(4)

**Brand:** eemb
**Price:** $68
**Availability:** ✅ In Stock

## Summary

> 🔋 Power your lifestyle with precision and protection—never settle for less!

## Quick Answers

- **What is this?** Lithium Polymer battery 3.7V 250mAh 502030 Lipo Rechargeable Battery Pack with wire JST Connector for VXI Blue Parrott and MP3 MP4 Speaker-confirm device & connector polarity before purchase(4) by eemb
- **How much does it cost?** $68 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/401008109-lithium-polymer-battery-3-7v-250mah-502030-lipo-rechargeable-battery)

## 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

- • **Precision Power Fit:** Designed with exact 502030 size and JST connector for seamless device compatibility—no guesswork, no risk.
- • **Lightweight & Compact:** At just 5 grams and slim dimensions, it fits discreetly into your tech without adding bulk or weight.
- • **Advanced Safety Shield:** Built-in PCM protection guards against overcharge, over-discharge, short circuits, and temperature spikes for worry-free performance.
- • **Certified Quality Assurance:** UN 38.3 and UL certified for trusted safety and durability—because your devices deserve the best.
- • **Reliable Long-Lasting Charge:** 250mAh capacity ensures extended use for your Bluetooth speakers, MP3 players, and smart devices without frequent recharges.

## Overview

The EEMB Lithium Polymer Battery Pack is a 3.7V, 250mAh rechargeable power source tailored for Bluetooth speakers, MP3/MP4 devices, and other smart electronics. Featuring a precise 502030 size and JST connector, it guarantees perfect fit and polarity match. With multi-layer PCM protection and certifications including UN 38.3 and UL, it delivers safe, reliable, and long-lasting energy in a lightweight, compact form factor.

## Description

Shop EEMB Lithium Polymer battery 3.7V 250mAh 502030 Lipo Rechargeable Battery Pack with wire JST Connector for VXI Blue Parrott and MP3 MP4 Speaker-confirm device & connector polarity before purchase(4). Free delivery and returns on eligible orders.

Review: This 3.7V can replace an identical 3.2V battery. - I got this 3.7V to replace an obsolete 3.2Vwhich otherwise is just the same (size and looks). I charge it with a simple USB cable that plugs into the battery and my computer. I use it to power a small electric plane (which took the 3.2V) and the plane works perfectly.
Review: Perfect Battery for the job. - Did the job with no issues.

## 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: 250mAh, Min capacity: 230mAh; Weight: approximate 5g; Size: 20.5 x 32 x 5.3mm (WxLxH)
- 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.
- CERTIFICATIONS—UN 38.3 compliant. 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.
- 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 enabled smart home systems, PDA and digital cameras, GPS,monitoring units, e-books, tracking devices, sleep management equipment, blood oxygen tracking equipment, pulse monitors,wireless, IoT.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08VRZTHDL |
| Batteries | 4 Lithium Polymer batteries required. (included) |
| Best Sellers Rank | 5 in Flash Battery Packs |
| Brand | EEMB |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,633) |
| Date First Available | 10 Sept. 2021 |
| Delivery information | We cannot deliver certain products outside mainland UK ( Details ). We will only be able to confirm if this product can be delivered to your chosen address when you enter your delivery address at checkout. |
| Guaranteed software updates until | unknown |
| Item Weight | 5 Grams |
| Item model number | LP502030 |
| Package Dimensions L x W x H | 11.3 x 6.1 x 1.9 centimetres |
| Package Weight | 0.03 Kilograms |
| Part number | OI-MG10-GNGM |
| Product Dimensions L x W x H | 20 x 32 x 5 millimetres |
| Size | 502030 (250mAh) 4Pcs |

## Product Details

- **Battery capacity:** 250 Milliamp Hours
- **Battery cell composition:** Lithium Polymer
- **Brand:** EEMB
- **Number of batteries:** 4 Lithium Polymer batteries required. (included)

## Images

![Lithium Polymer battery 3.7V 250mAh 502030 Lipo Rechargeable Battery Pack with wire JST Connector for VXI Blue Parrott and MP3 MP4 Speaker-confirm device & connector polarity before purchase(4) - Image 1](https://m.media-amazon.com/images/I/71fds5cy6OL.jpg)

## 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

### ⭐⭐⭐⭐⭐ This 3.7V can replace an identical 3.2V battery.
*by M***Z on 14 October 2025*

I got this 3.7V to replace an obsolete 3.2Vwhich otherwise is just the same (size and looks). I charge it with a simple USB cable that plugs into the battery and my computer. I use it to power a small electric plane (which took the 3.2V) and the plane works perfectly.

### ⭐⭐⭐⭐⭐ Perfect Battery for the job.
*by B***D on 4 December 2025*

Did the job with no issues.

### ⭐⭐⭐⭐ Took a few charges to retain full capacity
*by D***R on 2 October 2024*

Replacement for dashcam battery. Quick delivery but appeared to take a few charges to reach reliable full capacity. Good value overall

## Frequently Bought Together

- EEMB Lithium Polymer battery 3.7V 250mAh 502030 Lipo Rechargeable Battery Pack with wire JST Connector for VXI Blue Parrott and MP3 MP4 Speaker-confirm device & connector polarity before purchase(4)
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**Shop now:** [https://www.desertcart.nz/products/401008109-lithium-polymer-battery-3-7v-250mah-502030-lipo-rechargeable-battery](https://www.desertcart.nz/products/401008109-lithium-polymer-battery-3-7v-250mah-502030-lipo-rechargeable-battery)

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-01-23*