---
product_id: 239441619
title: "EEMB Lithium Polymer battery 3.7V 820mAh 653042 Lipo Rechargeable Battery Pack with wire JST Connector-confirm device & connector polarity before purchase"
brand: "eemb"
price: "$16.28"
currency: USD
in_stock: true
reviews_count: 13
category: "Eemb"
url: https://www.desertcart.us/products/239441619-eemb-lithium-polymer-battery-3-7v-820mah-653042-lipo-rechargeable
store_origin: US
region: United States of America
---

# 820mAh Capacity 3.7V Voltage PCM Protection EEMB Lithium Polymer battery 3.7V 820mAh 653042 Lipo Rechargeable Battery Pack with wire JST Connector-confirm device & connector polarity before purchase

**Brand:** eemb
**Price:** $16.28
**Availability:** ✅ In Stock

## Summary

> 🔋 Power your smart life with precision and protection!

## Quick Answers

- **What is this?** EEMB Lithium Polymer battery 3.7V 820mAh 653042 Lipo Rechargeable Battery Pack with wire JST Connector-confirm device & connector polarity before purchase by eemb
- **How much does it cost?** $16.28 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/239441619-eemb-lithium-polymer-battery-3-7v-820mah-653042-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

- • **Safety First:** Built-in PCM safeguards against overcharge, discharge, and short circuits
- • **Certified Quality:** UN 38.3 & UL certified for trusted, worry-free use
- • **Precision Fit & Power:** Compact 30x44x7mm size fits sleek devices seamlessly
- • **Reliable Energy Boost:** 820mAh typical capacity ensures long-lasting performance for your smart gadgets
- • **Device-Specific Compatibility:** Confirm polarity & connector type to avoid costly hardware damage

## Overview

The EEMB Lithium Polymer Battery 3.7V 820mAh 653042 is a compact, rechargeable power source designed for Bluetooth speakers, smart home devices, GPS, and more. Featuring a precise JST connector, PCM safety protection, and certifications including UN 38.3 and UL, it delivers reliable energy with a slim profile. Perfect for professionals who demand dependable, long-lasting battery performance—just ensure polarity compatibility to keep your devices safe.

## Description

Free delivery and returns on eligible orders. Buy EEMB Lithium Polymer battery 3.7V 820mAh 653042 Lipo Rechargeable Battery Pack with wire JST Connector-confirm device & connector polarity before purchase at desertcart UK.

Review: Fits Well for Meshtastic Builds but Check Your Polarity - I bought this 3.7V 820mAh LiPo battery to fit into a 3D printed Meshtastic case. The size was just right and it slotted in neatly without any issues. Fortunately, the polarity on the connector was correct for my board, so I was able to plug it in without any modifications. That said, it is always important to double-check the polarity before connecting, as different boards and connectors are not always wired the same way. Getting it wrong could easily damage your hardware. Performance so far has been solid, and it holds a decent charge for the low-power use case. A good battery for compact LoRa projects, as long as you take the usual precautions.
Review: Great - Nice batteries read the correct mah

## 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.//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 | B082152887 |
| Batteries | 1 Lithium Polymer batteries required. (included) |
| Best Sellers Rank | 4,790 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 124 in Rechargeable Household Batteries |
| Brand | EEMB |
| Customer Reviews | 4.2 4.2 out of 5 stars (938) |
| 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 | 0.02 Kilograms |
| Item model number | LP653042-PCM |
| Package Dimensions L x W x H | 12.3 x 6.1 x 1.9 centimetres |
| Package Weight | 0.02 Kilograms |
| Part number | LP653042 |
| Product Dimensions L x W x H | 30 x 44 x 7 millimetres |
| Size | 1 |

## Product Details

- **Battery capacity:** 820 Milliamp Hours
- **Battery cell composition:** Lithium Polymer
- **Brand:** EEMB
- **Number of batteries:** 1 Lithium Polymer batteries required. (included)

## Images

![EEMB Lithium Polymer battery 3.7V 820mAh 653042 Lipo Rechargeable Battery Pack with wire JST Connector-confirm device & connector polarity before purchase - Image 1](https://m.media-amazon.com/images/I/61uIJYr0CnL.jpg)

## Available Options

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

## Questions & Answers

**Q: Can this be used for a Christmas jumper?**
A: Much to small and no holes for arms or head

**Q: How do you charge these?
I have tried the built in charger on an Esp32 ( which it was bought for) and a charger for my quadcopter but neither works**
A: Check voltage output from the charger you are using. Also check the battery voltage. One if the two is dud

**Q: Hi the lithium battery i want to replace is 3.7v 800mah 2.96wh and measures 4cmx2.6cm and a depth of 0.5 cm can you advise the best match**
A: The size needs to fit your device so as long as its a 3.7 800. I would not worry too much

**Q: Hi Can you recommend a suitable battery charger?**
A: As far as I'm aware you cannot charge these batteries as 'stand alones' they need to be incorporated into the device for which you purchased them, then the compatible DV charger that either came with that device, (or one that meets the suitability of the device and batteries) is used to charge them?  A 12V DC input charger is what I use personally but this may vary from device to device?

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fits Well for Meshtastic Builds but Check Your Polarity
*by T***N on 13 August 2025*

I bought this 3.7V 820mAh LiPo battery to fit into a 3D printed Meshtastic case. The size was just right and it slotted in neatly without any issues. Fortunately, the polarity on the connector was correct for my board, so I was able to plug it in without any modifications. That said, it is always important to double-check the polarity before connecting, as different boards and connectors are not always wired the same way. Getting it wrong could easily damage your hardware. Performance so far has been solid, and it holds a decent charge for the low-power use case. A good battery for compact LoRa projects, as long as you take the usual precautions.

### ⭐⭐⭐⭐⭐ Great
*by D***Y on 2 November 2025*

Nice batteries read the correct mah

### ⭐⭐⭐⭐⭐ Replacement for Tyrepal Solar Display
*by P***S on 3 August 2024*

Bought to replace defective rechargeable battery for my Tyrepal system. Easy to replace though had to change connection plug which was larger than original. All charged and working as designed and was great value and much cheaper than having to buy a whole new system due to a failed battery.

## 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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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-20*