---
product_id: 670889663
title: "EEMB 3.7V 620mAh 852040 Lithium Polymer ion Battery Rechargeable Lithium ion Polymer Battery with JST Connector (UL Certified for Cell) Make Sure Device Polarity Matches with Battery Before Purchase!"
brand: "eemb"
price: "¥21"
currency: JPY
in_stock: false
url: https://www.desertcart.jp/products/670889663-eemb-3-7v-620mah-852040-lithium-polymer-ion-battery-rechargeable
store_origin: JP
region: Japan
---

# 620mAh High Capacity 3.7V Nominal Voltage Multi-layer PCM Safety Protection EEMB 3.7V 620mAh 852040 Lithium Polymer ion Battery Rechargeable Lithium ion Polymer Battery with JST Connector (UL Certified for Cell) Make Sure Device Polarity Matches with Battery Before Purchase!

**Brand:** eemb
**Price:** ¥21
**Availability:** ❌ Out of Stock

## Summary

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

## Quick Answers

- **What is this?** EEMB 3.7V 620mAh 852040 Lithium Polymer ion Battery Rechargeable Lithium ion Polymer Battery with JST Connector (UL Certified for Cell) Make Sure Device Polarity Matches with Battery Before Purchase! by eemb
- **How much does it cost?** ¥21 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/670889663-eemb-3-7v-620mah-852040-lithium-polymer-ion-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

- • **Long-lasting Energy:** 620mAh capacity delivers reliable, consistent power for your smart devices and wearables.
- • **Precision Power Fit:** Exact 20.5x42x8.8mm size ensures seamless device compatibility—no guesswork, no risk.
- • **Certified Safety Assurance:** UL certified with advanced PCM protection guarding against overcharge, short circuit, and overheating.
- • **Direct Manufacturer Support:** Get expert help within 24 hours—because your tech deserves premium care.
- • **Versatile Device Compatibility:** Perfect for Bluetooth speakers, dash cams, smart home gadgets, and more—stay connected effortlessly.

## Overview

The EEMB 3.7V 620mAh Lithium Polymer Battery offers a compact, UL-certified power solution with advanced PCM protection for overcharge, short circuit, and temperature control. Designed for a wide range of smart devices, it ensures reliable, long-lasting energy with direct manufacturer support for peace of mind.

## Description

Specification:LP852040Typical capacity: 620mAh, Min capacity: 580mAhNominal Voltage: 3.7 VWeight: 12.4gMaximum Charge Current: 700 mALimited Voltage: 4.200±0.020 VEnd-of Current: 12 mAMaximum Discharge Current: 1240 mACut-off Voltage: 2.750±0.005 VCharge Temperature: 0 ~ 45 ℃Discharge Temperature: -20 ~ +60 ℃Storage Relative Humidity: 65 ± 20 %Overcharge Detection Voltage: 4.28± 0.05VOverdischarge Detection Voltage: 3.0± 0.1VPCM protection function: over charge, over discharge, over current, short circuit protection, over temperature protection.APPLICATION:PSP batteryPhantom 3 standard controllerHome security systemBlue tooth headset batteryHandheld remoteBluetooth speakerKise machine batteryPDA and digital camerasTracking devicesNotebook computersPulse monitorsWi-Fi enabled smart home systems

## 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: 620mAh, Weight: approximate 12g; Size: 20.5 x 42 x 8.8mm/0.81"x1.65"x0.34" (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 |
|---------------|-------|
| Item Dimensions | 0.81 x 1.65 x 0.35 inches |
| Item Weight | 0.01 Kilograms |
| Battery Weight | 13 Grams |
| Unit Count | 1 Count |
| Battery Cell Type | Polymer |
| Recommended Uses For Product | Drone |
| Reusability | Rechargeable |
| Battery Capacity | 700 Milliampere Hour (mAh) |
| Amperage | 12 Amps |
| Voltage | 3.7 Volts |

## Product Details

- **Number of batteries:** 1 Lithium Metal batteries required.
- **Brand:** EEMB
- **Battery cell composition:** Polymer
- **Battery capacity:** 620 Milliamp Hours
- **Recommended uses for product:** Cycle

## Images

![EEMB 3.7V 620mAh 852040 Lithium Polymer ion Battery Rechargeable Lithium ion Polymer Battery with JST Connector (UL Certified for Cell) Make Sure Device Polarity Matches with Battery Before Purchase! - Image 1](https://m.media-amazon.com/images/I/61bOc0xt1CL.jpg)
![EEMB 3.7V 620mAh 852040 Lithium Polymer ion Battery Rechargeable Lithium ion Polymer Battery with JST Connector (UL Certified for Cell) Make Sure Device Polarity Matches with Battery Before Purchase! - Image 2](https://m.media-amazon.com/images/I/71iLWOwmlpL.jpg)
![EEMB 3.7V 620mAh 852040 Lithium Polymer ion Battery Rechargeable Lithium ion Polymer Battery with JST Connector (UL Certified for Cell) Make Sure Device Polarity Matches with Battery Before Purchase! - Image 3](https://m.media-amazon.com/images/I/61dqlGvT4mL.jpg)
![EEMB 3.7V 620mAh 852040 Lithium Polymer ion Battery Rechargeable Lithium ion Polymer Battery with JST Connector (UL Certified for Cell) Make Sure Device Polarity Matches with Battery Before Purchase! - Image 4](https://m.media-amazon.com/images/I/71ZVPBH+WcL.jpg)
![EEMB 3.7V 620mAh 852040 Lithium Polymer ion Battery Rechargeable Lithium ion Polymer Battery with JST Connector (UL Certified for Cell) Make Sure Device Polarity Matches with Battery Before Purchase! - Image 5](https://m.media-amazon.com/images/I/61-mZPgY+HL.jpg)

## Frequently Bought Together

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-12*