---
product_id: 629175587
title: "DC 3.7V 800mAh 603040 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: "S/.107"
currency: PEN
in_stock: true
url: https://www.desertcart.pe/products/629175587-dc-3-7v-800mah-603040-rechargeable-lithium-polymer-battery-suitable
store_origin: PE
region: Peru
---

# 3.7V nominal voltage, 4.2V full charge 800mAh high-capacity power Built-in multi-protection IC DC 3.7V 800mAh 603040 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:** S/.107
**Availability:** ✅ In Stock

## Summary

> 🔋 Power your innovation with safety and style!

## Quick Answers

- **What is this?** DC 3.7V 800mAh 603040 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?** S/.107 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pe](https://www.desertcart.pe/products/629175587-dc-3-7v-800mah-603040-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

- • **Reliable Safety:** Japanese Seiko IC guards against overcharge, overdischarge, and short circuits
- • **Compact Powerhouse:** Sleek 6×30×41mm size fits seamlessly into your DIY projects
- • **Hassle-Free Warranty:** 1-year replacement guarantee keeps your projects worry-free
- • **Lightweight & Efficient:** Only 16g yet delivers a robust 0.8A max current for steady performance
- • **Plug & Play Flexibility:** 2-wire JST 1.25mm connector with heat-shrink sleeve for easy custom wiring

## Overview

This 3.7V 800mAh rechargeable lithium polymer battery offers a compact, lightweight solution for DIY electronics requiring 3.7-5V power. Featuring a built-in Japanese Seiko IC for overcharge and short circuit protection, a 2-wire JST connector for easy integration, and a durable silicone cable, it ensures reliable, safe performance. Ideal for hobbyists and professionals alike, it comes with a 1-year replacement warranty for peace of mind.

## Description

Full description not available

## Features

- This battery is suitable for DIY electronic products with 3.7-5V and less than 2.96Wh 800mAh 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.
- 603040 rechargeable lithium ion polymer battery, nominal voltage 3.7V, full charge voltage 4.2V, capacity 800mAh, power 2.96Wh, ★size 6×30×41mm(0.236×1.181×1.596inch）(T*W*L), Weight:16g(0.564oz)，Maximum current:0.8A。 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, 3302-26 high temperature resistant silicone cable, and genuine JST Pitch 1.25mm ★2 wire connector module.
- If there are any quality issues within a year, ★please feel free to contact us via email for replacement.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | HXJN |
| Item model number | 603040 |
| Product Dimensions | 4.1 x 3 x 0.6 cm; 18.7 g |
| ASIN | B09YQ2C1KR |

## Product Details

- **Number of batteries:** 1 C batteries required. (included)
- **Brand:** HXJNLDC
- **Battery cell composition:** Lithium Polymer
- **Battery capacity:** 800 Milliamp Hours
- **Recommended uses for product:** Power Tool

## Images

![DC 3.7V 800mAh 603040 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/61OCFCtcXgL.jpg)

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*Product available on Desertcart Peru*
*Store origin: PE*
*Last updated: 2026-01-23*