---
product_id: 179363175
title: "LP653042"
brand: "eemb"
price: "¥3220"
currency: JPY
in_stock: null
reviews_count: 13
category: "Eemb"
url: https://www.desertcart.jp/products/179363175-lp653042
store_origin: JP
region: Japan
---

# 820mAh Capacity 3.7V Voltage JST Connector LP653042

**Brand:** eemb
**Price:** ¥3220
**Availability:** ❌ Out of Stock

## Summary

> 🔋 Power your wireless lifestyle with precision and confidence!

## Quick Answers

- **What is this?** LP653042 by eemb
- **How much does it cost?** ¥3220 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/179363175-lp653042)

## 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

- • **Compact & Lightweight:** Sleek 30.5x44x6.8mm design weighing just 16.4g—ideal for seamless integration into portable devices.
- • **Precision Power Match:** Ensure perfect device polarity compatibility to avoid short circuits and maximize safety.
- • **Reliable Long Cycle Life:** Engineered with PCM protection for overcharge, over-discharge, and short circuit safety—lasting performance you can trust.
- • **Versatile Wireless Freedom:** Perfect for Bluetooth speakers, smart home devices, GPS, and more—cut the cords and join the wireless revolution.
- • **Certified Quality Assurance:** UN 38.3 and UL certified for peace of mind in every charge and discharge cycle.

## Overview

The EEMB 3.7V 820mAh Lithium Polymer Battery Pack features a compact form factor with a reliable JST connector, designed specifically for wireless devices like Bluetooth speakers and smart home gadgets. It offers robust safety protections, UL and UN certifications, and a long cycle life, ensuring dependable, portable power wherever you go.

## Description

Buy EEMB Lithium Polymer Battery 3.7V 820mAh 653042 Lipo Rechargeable Battery Pack with Wire JST Connector for Speaker and Wireless Device- Confirm Device & Connector Polarity Before Purchase: 3.7V - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Battery Convenience - This battery does well! I did have a project of intalling battery to a bluetooth divice which didn't have a internl battery, so I inproviced this battery in conjuction with a module to recharge it and it worked perfectly, now my device doesn't need to be connected to electrcity all the time I just change the battery and I'm done for atleast 6 hours of operación wirelessly. Pretty good!
Review: Great so far. Capacity is as advertised - So far I'm very pleased with this battery. The four stars is only because I've only charged and discharged it twice so far. I ran a capacity test at the rated current and voltage and measured almost exactly the claimed mAHr. Excellent!

## 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: 820mAh, Min capacity: 770mAh; Weight: approximate 16.4g; Size: 30.5 x 44 x 6.8mm/1.2"x1.69"x0.26" (WxLxH)
- 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.
- 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, e-books, tracking devices, blood oxygen tracking equipment, pulse monitors, wireless, IoT.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B082152887 |
| Batteries | 1 Lithium Polymer batteries required. (included) |
| Best Sellers Rank | #140,505 in Health & Household ( See Top 100 in Health & Household ) #165 in 3.7V Batteries |
| Customer Reviews | 4.2 4.2 out of 5 stars (947) |
| Date First Available | November 25, 2019 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.563 ounces |
| Item model number | LP653042-PCM |
| Manufacturer | EEMB Co.,Ltd |
| Product Dimensions | 1.2 x 1.73 x 0.27 inches |

## Product Details

- **Battery Capacity:** 820 Milliamp Hours
- **Battery Cell Composition:** Lithium Polymer
- **Brand:** EEMB
- **Number of Batteries:** 1 Lithium Polymer batteries required. (included)

## Images

![LP653042 - Image 1](https://m.media-amazon.com/images/I/61uIJYr0CnL.jpg)

## Questions & Answers

**Q: What does it go to**
A: It is used for powering Ada Fruit  projects.

**Q: how long does a recharge take?**
A: It depends on the charger. One warning, this battery has a negative voltage on the Red lead. I bought this to work with a microcomputer circuit and the polarity was wrong.  Also make sure the charger is the right polarity, you can cause the battery or charger can catch fire. It was easy to change to polarity of the connector.

**Q: Is this compatible with the Kobo H503456 ereader battery that is no longer available? 1000mAh?**
A: Make sure the measurements will accommodate 44mmx30mmx6.8mm. Most like yes.

**Q: Does it really weight 16.4 grams? That seems way too heavy. 1.64g maybe?**
A: 16.4 g is around half an ounce.  Other batteries of this type seems be in this range. I cant remove mine to weigh it for you. 16.4 seems real...

## Customer Reviews

### ⭐⭐⭐⭐⭐ Battery Convenience
*by A***R on May 28, 2024*

This battery does well! I did have a project of intalling battery to a bluetooth divice which didn't have a internl battery, so I inproviced this battery in conjuction with a module to recharge it and it worked perfectly, now my device doesn't need to be connected to electrcity all the time I just change the battery and I'm done for atleast 6 hours of operación wirelessly. Pretty good!

### ⭐⭐⭐⭐ Great so far. Capacity is as advertised
*by H***Y on April 13, 2025*

So far I'm very pleased with this battery. The four stars is only because I've only charged and discharged it twice so far. I ran a capacity test at the rated current and voltage and measured almost exactly the claimed mAHr. Excellent!

### ⭐⭐⭐⭐⭐ Size matters
*by S***N on July 14, 2025*

Same as original. I had to have a replacement exactly the same size to fit inside my dash cam. Had to solder the leads as the original.

## Frequently Bought Together

- EEMB Lithium Polymer Battery 3.7V 820mAh 653042 Lipo Rechargeable Battery Pack with Wire JST Connector for Speaker and Wireless Device- Confirm Device & Connector Polarity Before Purchase
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**Shop now:** [https://www.desertcart.jp/products/179363175-lp653042](https://www.desertcart.jp/products/179363175-lp653042)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-01-27*