---
product_id: 628301206
title: "DC 3.7V 4200mah 606090 Rechargeable Lithium Polymer Battery, Suitable for DIY 3.7-5V Electronic Products with Built-in 2-Wire Battery Replacement and LED Lights"
brand: "hxjnldc"
price: "$38.41"
currency: USD
in_stock: true
reviews_count: 5
category: "Hxjnldc"
url: https://www.desertcart.us/products/628301206-dc-3-7v-4200mah-606090-rechargeable-lithium-polymer-battery-suitable
store_origin: US
region: United States of America
---

# 4A max discharge current 4200mAh high capacity Built-in multi-protection IC DC 3.7V 4200mah 606090 Rechargeable Lithium Polymer Battery, Suitable for DIY 3.7-5V Electronic Products with Built-in 2-Wire Battery Replacement and LED Lights

**Brand:** hxjnldc
**Price:** $38.41
**Availability:** ✅ In Stock

## Summary

> 🔋 Power up your passion projects with smart, safe, and sleek energy!

## Quick Answers

- **What is this?** DC 3.7V 4200mah 606090 Rechargeable Lithium Polymer Battery, Suitable for DIY 3.7-5V Electronic Products with Built-in 2-Wire Battery Replacement and LED Lights by hxjnldc
- **How much does it cost?** $38.41 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/628301206-dc-3-7v-4200mah-606090-rechargeable-lithium-polymer-battery-suitable)

## Best For

- hxjnldc enthusiasts

## Why This Product

- Trusted hxjnldc brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Plug & Play Versatility:** Built-in 2-wire replacement with customizable wiring for seamless integration
- • **Slim & Lightweight Design:** Compact 606090 form factor (92×60×6mm) fits tight spaces without bulk
- • **Reliable Support & Warranty:** 1-year hassle-free replacement ensures your projects never stall
- • **Safe & Smart Battery Management:** Japanese Seiko IC protects against overcharge, overdischarge, and short circuits
- • **Power Your DIY Projects with Confidence:** 4200mAh capacity fuels your 3.7-5V electronics longer and stronger

## Overview

This DC 3.7V 4200mAh 606090 rechargeable lithium polymer battery delivers a robust 15.54Wh capacity with a compact 92×60×6mm size, ideal for DIY electronics operating between 3.7-5V. Featuring a built-in 2-wire replacement system and a premium Japanese Seiko IC for overcharge, overdischarge, and short circuit protection, it ensures safe, reliable power delivery up to 4A max current. Lightweight at just 84g, it’s perfect for hobbyists seeking a durable, versatile battery solution backed by a 1-year replacement warranty.

## Description

Buy DC 3.7V 4200mah 606090 Rechargeable Lithium Polymer Battery, Suitable for DIY 3.7-5V Electronic Products with Built-in 2-Wire Battery Replacement and LED Lights online on desertcart.ae at best prices. ✓ Fast and free shipping ✓ free returns ✓ cash on delivery available on eligible purchase.

Review: Der Akku hat unser Babyphone gerettet. Der Originalakku war aufgebläht. Dieser hat zwar marginal weniger Kapazität, passt aber ins Gehäuse. Lädt und halt die Ladung...
Review: Goed product maar wel opletten dat je de versie met of zonder electronica aan de + en - draden bestelt, volgens vereiste van toepassing.

## Features

- This battery is suitable for DIY electronic products with 3.7-5V and less than 15.54Wh 4200mAh built-in 2-wire battery replacement.（★ Not applicable to high-power electric tools and model aircraft）
- Please note that the specifications and polarity of the connector are based on the product display image,★the red wire is the positive "+" and the black wire is the negative "-"，Do not reverse-charge or reverse-connectreverse. ★The primary battery of some products has no plug or mismatched plug or mismatched polarity. It doesn't matter, you can cut and solder the plug directly or use our heat shrinkable insulating sleeve to connect the same color wire.
- ★606090 rechargeable lithium ion polymer battery, nominal voltage 3.7V, full charge voltage 4.2V, capacity 4200mAh, power 15.54Wh, size 92×60×6mm(3.543 x 2.362 x 0.236inch) (L*W*T), Weight:2.963oz(84g)，Maximum current:4A。 It can prevent overcharge, overdischarge, overcurrent, and short circuit.
- ★It‘s consists of of large-capacity A+ lithium battery, Japanese Seiko IC overcharge and overcurrent short circuit protection board, 3302-24 high temperature resistant silicone cable.
- If there are any quality issues within a year, ★please feel free to contact us via email for replacement.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B095BP7V1D |
| Best Sellers Rank | #35,383 in Electronics ( See Top 100 in Electronics ) #310 in Rechargeable Household Batteries |
| Country of origin | China |
| Item model number | 606090 |
| Manufacturer | HXJNLDC |
| Product Dimensions | 9.1 x 6 x 0.6 cm; 80 g |

## Product Details

- **Battery capacity:** 4200 Milliamp Hours
- **Battery cell composition:** Lithium Polymer
- **Brand:** HXJNLDC
- **Number of batteries:** 1 Lithium Polymer batteries required. (included)
- **Recommended uses for product:** Protection

## Images

![DC 3.7V 4200mah 606090 Rechargeable Lithium Polymer Battery, Suitable for DIY 3.7-5V Electronic Products with Built-in 2-Wire Battery Replacement and LED Lights - Image 1](https://m.media-amazon.com/images/I/61vCoJ7fMmL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by L***S on 10 February 2024*

Der Akku hat unser Babyphone gerettet. Der Originalakku war aufgebläht. Dieser hat zwar marginal weniger Kapazität, passt aber ins Gehäuse. Lädt und halt die Ladung...

### ⭐⭐⭐⭐ Review
*by P***S on 30 September 2025*

Goed product maar wel opletten dat je de versie met of zonder electronica aan de + en - draden bestelt, volgens vereiste van toepassing.

### ⭐⭐⭐⭐⭐ Review
*by P***U on 12 January 2026*

trés bien

## Frequently Bought Together

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-26*