---
product_id: 628798982
title: "3.7V 503040 620mAh Rechargeable Lithium Polymer Battery, Suitable for cozmo Vector robot Battery replacement,SkyBell HD WiFi Video Doorbell、Flysight FPV Watch、 wireless speaker Battery replacement"
brand: "hxjnldc"
price: "119.43 DT"
currency: TND
in_stock: true
category: "Hxjnldc"
url: https://www.desertcart.tn/products/628798982-3-7v-503040-620mah-rechargeable-lithium-polymer-battery-suitable-cozmo
store_origin: TN
region: Tunisia
---

# 3.7V nominal, 4.2V full charge voltage 620mAh high-capacity power Built-in overcharge & short circuit protection 3.7V 503040 620mAh Rechargeable Lithium Polymer Battery, Suitable for cozmo Vector robot Battery replacement,SkyBell HD WiFi Video Doorbell、Flysight FPV Watch、 wireless speaker Battery replacement

**Brand:** hxjnldc
**Price:** 119.43 DT
**Availability:** ✅ In Stock

## Summary

> 🔋 Power up your tech game with smart, safe, and sleek energy!

## Quick Answers

- **What is this?** 3.7V 503040 620mAh Rechargeable Lithium Polymer Battery, Suitable for cozmo Vector robot Battery replacement,SkyBell HD WiFi Video Doorbell、Flysight FPV Watch、 wireless speaker Battery replacement by hxjnldc
- **How much does it cost?** 119.43 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/628798982-3-7v-503040-620mah-rechargeable-lithium-polymer-battery-suitable-cozmo)

## 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

- • **Safety First, Always:** Japanese Seiko IC safeguards against overcharge, overcurrent, and short circuits.
- • **Lightweight Yet Mighty:** Only 13g, delivering powerful performance without bulk—ideal for portable gadgets.
- • **Plug & Play with Confidence:** Genuine JST 1.25mm 2-wire connector with heat shrink sleeve for secure, easy installation.
- • **Precision Fit for DIY Innovators:** Compact 5×30×41mm size fits perfectly in a variety of 3.7-5V electronics.
- • **Power Your Smart Devices Seamlessly:** 620mAh capacity ensures long-lasting energy for your Cozmo Vector, SkyBell, and more.

## Overview

This 3.7V 620mAh rechargeable lithium polymer battery is engineered for reliable replacement in Cozmo Vector robots, SkyBell HD WiFi video doorbells, Flysight FPV watches, and wireless speakers. Featuring a compact 5×30×41mm form factor and weighing just 13g, it delivers 2.294Wh of power with built-in Japanese Seiko IC protection against overcharge, overcurrent, and short circuits. Designed for DIY enthusiasts and professionals alike, it includes a genuine JST 1.25mm 2-wire connector and heat shrinkable insulating sleeve for safe, easy installation. Backed by a 1-year quality guarantee, this battery ensures your smart devices stay powered and protected.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Battery capacity | 620 Milliamp Hours |
| Battery cell composition | Lithium Polymer |
| Brand | HXJNLDC |
| Number of batteries | 1 C batteries required. (included) |
| Recommended uses for product | Doorbell, GPS, MP3 Player, Radio, Speaker, Toys, Watch |
| Voltage | 3.7 Volts (DC) |

## Product Details

- **Battery capacity:** 620 Milliamp Hours
- **Battery cell composition:** Lithium Polymer
- **Brand:** HXJNLDC
- **Number of batteries:** 1 C batteries required. (included)
- **Recommended uses for product:** Doorbell, GPS, MP3 Player, Radio, Speaker, Toys, Watch

## Images

![3.7V 503040 620mAh Rechargeable Lithium Polymer Battery, Suitable for cozmo Vector robot Battery replacement,SkyBell HD WiFi Video Doorbell、Flysight FPV Watch、 wireless speaker Battery replacement - Image 1](https://m.media-amazon.com/images/I/61HDn2M23KL.jpg)

## Frequently Bought Together

- HXJNLDC DC 3.7V 620mAh 503040 Rechargeable Lithium Polymer Battery for Cozmo Vector Robot SkyBell HD WiFi Video Doorbell Flysight FPV Watch Wireless Speaker Battery Replacement
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**Shop now:** [https://www.desertcart.tn/products/628798982-3-7v-503040-620mah-rechargeable-lithium-polymer-battery-suitable-cozmo](https://www.desertcart.tn/products/628798982-3-7v-503040-620mah-rechargeable-lithium-polymer-battery-suitable-cozmo)

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-07-29*