---
product_id: 651530950
title: "3.7V 4000mAh Battery 606090 Lithium Polymer Ion Rechargeable Li-ion Li-Po Battery with 2P PH 2.0mm Pitch Connector"
brand: "uxney"
price: "€ 38.17"
currency: EUR
in_stock: true
reviews_count: 8
category: "Uxney"
url: https://www.desertcart.it/products/651530950-3-7v-4000mah-battery-606090-lithium-polymer-ion-rechargeable-li
store_origin: IT
region: Italy
---

# 3.7V stable voltage 4000mAh high capacity 2P PH 2.0mm connector 3.7V 4000mAh Battery 606090 Lithium Polymer Ion Rechargeable Li-ion Li-Po Battery with 2P PH 2.0mm Pitch Connector

**Brand:** uxney
**Price:** € 38.17
**Availability:** ✅ In Stock

## Summary

> 🔋 Power your productivity with the battery that keeps up with your hustle!

## Quick Answers

- **What is this?** 3.7V 4000mAh Battery 606090 Lithium Polymer Ion Rechargeable Li-ion Li-Po Battery with 2P PH 2.0mm Pitch Connector by uxney
- **How much does it cost?** € 38.17 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/651530950-3-7v-4000mah-battery-606090-lithium-polymer-ion-rechargeable-li)

## Best For

- uxney enthusiasts

## Why This Product

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

## Key Features

- • **Power That Lasts:** 4000mAh capacity keeps your devices running longer without constant recharging.
- • **Slim & Lightweight:** Compact 90x60x6mm size and just 74g weight—engineered for sleek, portable devices.
- • **Trusted Performance:** Highly rated by users as a reliable, durable lithium polymer battery for everyday tech.
- • **Fast & Safe Charging:** Supports max charge voltage of 4.25V and current of 2000mAh for efficient power top-ups.
- • **Seamless Compatibility:** Drop-in replacement with a precise 2P PH 2.0mm pitch connector for hassle-free installation.

## Overview

This 3.7V 4000mAh lithium polymer rechargeable battery features a slim 90x60x6mm form factor and a 2P PH 2.0mm pitch connector, making it an ideal drop-in replacement for devices like the Keychron K4. Weighing only 74g, it supports a maximum charging voltage of 4.25V and current of 2000mAh, delivering reliable, long-lasting power in a compact design.

## Description

Voltage: 3.7V; Capacity: 4000mAh; Maximum charging voltage/current: DC4.25V/2000mAh Package Content: 1 x Lithium Polymer Battery Material: Lithium polymer Net weight: 74g

Review: If you're looking for a replacement battery for your Keychron K4 - This is a drop in replacement for the battery on a Keychron K4. Great battery so far, no issues whatsoever. Has the correct connector and easy to install.
Review: worked fine - Battery seems to work fine

## Features

- Voltage: 3.7V; Capacity: 4000mAh；Maximum Charge Voltage/Current: DC4.25V/2000mAh
- Package Content: 1 x Lithium Polymer Battery
- Material: Lithium Polymer; Net Weight: 74g
- Connector Type: 2P 2.0mm Pitch; Cable Length: 5cm / 2"
- Size: 90mm x 60mm x 6mm/3.51" x 2.34" x 0.23"

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DB1VKT9X |
| Battery Capacity | 4000 Milliampere Hour (mAh) |
| Battery Cell Type | Lithium Ion |
| Battery Weight | 0.1 Pounds |
| Battery capacity | 4000 Milliampere Hour (mAh) |
| Battery cell composition | Lithium Ion |
| Best Sellers Rank | 7,081 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 172 in Rechargeable Household Batteries |
| Brand | Uxney |
| Brand Name | Uxney |
| Country of Origin | China |
| Customer Reviews | 4.2 out of 5 stars 55 Reviews |
| Manufacturer | Uxney |
| Model Number | UK606090 |
| Number of Batteries | 1 Lithium Ion batteries required. (included) |
| Number of batteries | 1 Lithium Ion batteries required. (included) |
| Reusability | Rechargeable |
| Unit Count | 1.0 Count |
| Unit count | 1.0 Count |
| Voltage | 3.7 Volts |

## Product Details

- **Number of batteries:** 1 Lithium Ion batteries required. (included)
- **Brand:** Uxney
- **Battery cell composition:** Lithium Ion
- **Battery capacity:** 4000 Milliampere Hour (mAh)
- **Unit count:** 1.0 Count

## Images

![3.7V 4000mAh Battery 606090 Lithium Polymer Ion Rechargeable Li-ion Li-Po Battery with 2P PH 2.0mm Pitch Connector - Image 1](https://m.media-amazon.com/images/I/51RIaIQV+WL.jpg)
![3.7V 4000mAh Battery 606090 Lithium Polymer Ion Rechargeable Li-ion Li-Po Battery with 2P PH 2.0mm Pitch Connector - Image 2](https://m.media-amazon.com/images/I/61-PMPWdvSL.jpg)
![3.7V 4000mAh Battery 606090 Lithium Polymer Ion Rechargeable Li-ion Li-Po Battery with 2P PH 2.0mm Pitch Connector - Image 3](https://m.media-amazon.com/images/I/710wzuwQr5L.jpg)
![3.7V 4000mAh Battery 606090 Lithium Polymer Ion Rechargeable Li-ion Li-Po Battery with 2P PH 2.0mm Pitch Connector - Image 4](https://m.media-amazon.com/images/I/716GvXx9cdL.jpg)
![3.7V 4000mAh Battery 606090 Lithium Polymer Ion Rechargeable Li-ion Li-Po Battery with 2P PH 2.0mm Pitch Connector - Image 5](https://m.media-amazon.com/images/I/71OPFTFWDfL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ If you're looking for a replacement battery for your Keychron K4
*by C***S on 15 November 2025*

This is a drop in replacement for the battery on a Keychron K4. Great battery so far, no issues whatsoever. Has the correct connector and easy to install.

### ⭐⭐⭐⭐⭐ worked fine
*by A***L on 25 September 2025*

Battery seems to work fine

### ⭐⭐⭐⭐ Surprised how easy it was to swap the rechargeable battery
*by G***K on 6 September 2025*

I was greatly surprised and delighted that I could swap out the rechargeable battery on a product I really liked which I thought might be only fit for Landfill. The price was reasonable, relatively easy to fit and delivered quickly. Would definitely recommend.

## Frequently Bought Together

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-01-22*