---
product_id: 613570448
title: "3.7V 503040 Battery 620mAh for Cozmo Vector Robot Battery Replacement,SkyBell HD WiFi Video Doorbell Battery Replacement,Flysight FPV Watch、 Wireless Speaker Battery Replacement"
brand: "gymin"
price: "₪92"
currency: ILS
in_stock: false
reviews_count: 5
url: https://www.desertcart.co.il/products/613570448-3-7v-503040-battery-620mah-for-cozmo-vector-robot-battery
store_origin: IL
region: Israel
---

# 3.7V nominal voltage 620mAh capacity Built-in multi-protection circuit 3.7V 503040 Battery 620mAh for Cozmo Vector Robot Battery Replacement,SkyBell HD WiFi Video Doorbell Battery Replacement,Flysight FPV Watch、 Wireless Speaker Battery Replacement

**Brand:** gymin
**Price:** ₪92
**Availability:** ❌ Out of Stock

## Summary

> 🔋 Recharge your tech life with power and peace of mind!

## Quick Answers

- **What is this?** 3.7V 503040 Battery 620mAh for Cozmo Vector Robot Battery Replacement,SkyBell HD WiFi Video Doorbell Battery Replacement,Flysight FPV Watch、 Wireless Speaker Battery Replacement by gymin
- **How much does it cost?** ₪92 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.co.il](https://www.desertcart.co.il/products/613570448-3-7v-503040-battery-620mah-for-cozmo-vector-robot-battery)

## Best For

- gymin enthusiasts

## Why This Product

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

## Key Features

- • **Lightweight & Compact Design:** At just 13g, this battery replacement fits discreetly without adding bulk, perfect for sleek tech setups.
- • **Power Your Smart Devices Seamlessly:** 620mAh lithium polymer battery delivers reliable, long-lasting energy for your Cozmo Vector, SkyBell HD, and more.
- • **Safety First with Advanced Protection:** Integrated overcharge, overheat, and short circuit safeguards keep your devices and you safe 24/7.
- • **Optimized Voltage for Peak Performance:** 3.7V nominal voltage with a full charge up to 4.2V ensures your gadgets run at their best without compromise.
- • **Universal Compatibility for Everyday Tech:** Ideal for Cozmo Vector Robot, SkyBell HD WiFi Doorbell, Flysight FPV Watch, wireless speakers, and Bluetooth headsets—never miss a beat.

## Overview

This 3.7V 503040 lithium polymer battery offers 620mAh capacity and 2.3Wh power, engineered with built-in protection circuits to prevent overcharge, overheating, and short circuits. Lightweight at 13g, it’s compatible with Cozmo Vector Robot, SkyBell HD WiFi Video Doorbell, Flysight FPV Watch, wireless speakers, and Bluetooth headsets, making it a versatile and safe replacement battery for your essential smart devices.

## Description

Packing list: 620mAh battery x 1. Specification: Material: Lithium Li-ion Polymer Battery. Capacity: 620 mAh. Nominal Voltage：3.7V Power: 2.3Wh Work Voltage: 3.3 to 4.2v Cut-off voltage：DC 2.85V

Review: Vector is Talking and Dancing Again! - Brought my Vector Gen. 1 back to life!
Review: Did not work for Skybell Slimline - battery is too long and too wide. - My fault, I should have done a better job of converting inches to MM. I bought a cheap digital micrometer and got the right size on the second try. This one does not work for Skybell

## Features

- Compatible ：COZMO Vector robot, SkyBell HD WiFi Video Doorbell, Flysight FPV Watch, wireless speaker battery replacement，Wireeless bluetooth headset battery replacement.
- 503040 rechargeable lithium ion polymer battery, Nominal voltage 3.7V, full charge voltage: 4.2V, Capacity: 620mAh, Power: 2.29Wh, Weight:13g.
- Safety Features: The 3.7v rechargeable Lipo battery is built with high-quality materials and features built-in protection against overcharging, overheating, and short circuits, this ensures the battery operates optimally and eliminate the risk of any potential hazards.
- LP 503040 for cozmo battery, nominal voltage 3.7V, fully charged 4.2V, 620mAh capacity, Power 2.22Wh,Built-in battery protection circuit module PMC to prevent overdischarge and short circuit of this battery.
- Before replacing, please contrast with the old battery and check the polarity of the battery. Red wire connection power positive " +" , Black wire connect power negative pole "-". if is a reversed, you need position of interchange wires.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CRQ1BK3L |
| Batteries | 1 Lithium Polymer batteries required. (included) |
| Best Sellers Rank | #516,736 in Health & Household ( See Top 100 in Health & Household ) #1,677 in 3.7V Batteries #2,430 in Coin & Button Cell Batteries |
| Customer Reviews | 4.1 4.1 out of 5 stars (10) |
| Date First Available | January 7, 2024 |
| Item Weight | 0.423 ounces |
| Item model number | 503040 |
| Manufacturer | GYMIN |
| Package Dimensions | 5.71 x 3.82 x 1.89 inches |

## Product Details

- **Battery Capacity:** 620 Milliamp Hours
- **Battery Cell Composition:** Lithium Polymer
- **Brand:** GYMIN
- **Number of Batteries:** 1 Lithium Polymer batteries required. (included)
- **Recommended Uses For Product:** 503040 battery 620mAh

## Images

![3.7V 503040 Battery 620mAh for Cozmo Vector Robot Battery Replacement,SkyBell HD WiFi Video Doorbell Battery Replacement,Flysight FPV Watch、 Wireless Speaker Battery Replacement - Image 1](https://m.media-amazon.com/images/I/61PHHH3JWWL.jpg)
![3.7V 503040 Battery 620mAh for Cozmo Vector Robot Battery Replacement,SkyBell HD WiFi Video Doorbell Battery Replacement,Flysight FPV Watch、 Wireless Speaker Battery Replacement - Image 2](https://m.media-amazon.com/images/I/617bUwa+4BL.jpg)
![3.7V 503040 Battery 620mAh for Cozmo Vector Robot Battery Replacement,SkyBell HD WiFi Video Doorbell Battery Replacement,Flysight FPV Watch、 Wireless Speaker Battery Replacement - Image 3](https://m.media-amazon.com/images/I/61vVzd3PtYL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Vector is Talking and Dancing Again!
*by V***C on March 5, 2025*

Brought my Vector Gen. 1 back to life!

### ⭐⭐⭐⭐ Did not work for Skybell Slimline - battery is too long and too wide.
*by T***L on August 29, 2024*

My fault, I should have done a better job of converting inches to MM. I bought a cheap digital micrometer and got the right size on the second try. This one does not work for Skybell

### ⭐⭐⭐⭐⭐ Worked good
*by S***R on October 26, 2024*

It was a little bigger than the original but worked. Brought my little cosmo back to life.

## Frequently Bought Together

- GYMIN 3.7V 503040 Battery 620mAh for Cozmo Vector Robot Battery Replacement,SkyBell HD WiFi Video Doorbell Battery Replacement,Flysight FPV Watch、 Wireless Speaker Battery Replacement
- Energizer E90 N Alkaline 1.5 Volt Battery (6-Pack)

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*Product available on Desertcart Israel*
*Store origin: IL*
*Last updated: 2026-03-05*