---
product_id: 399266709
title: "External Power Supply Box with 2.5mm and 3.5mm Jack for Some Safe Box with External Battery Supply, 4 AA Battery Holder with Wires, 6V Backup Power Source for The Safe Box"
brand: "homeyuer"
price: "€ 14.44"
currency: EUR
in_stock: true
reviews_count: 8
category: "Homeyuer"
url: https://www.desertcart.de/products/399266709-external-power-supply-box-with-2-5mm-and-3-5mm
store_origin: DE
region: Germany
---

# 6V backup power 2.5mm & 3.5mm jack compatibility uninterrupted safe access External Power Supply Box with 2.5mm and 3.5mm Jack for Some Safe Box with External Battery Supply, 4 AA Battery Holder with Wires, 6V Backup Power Source for The Safe Box

**Brand:** homeyuer
**Price:** € 14.44
**Availability:** ✅ In Stock

## Summary

> 🔐 Power up your peace of mind — never get locked out again!

## Quick Answers

- **What is this?** External Power Supply Box with 2.5mm and 3.5mm Jack for Some Safe Box with External Battery Supply, 4 AA Battery Holder with Wires, 6V Backup Power Source for The Safe Box by homeyuer
- **How much does it cost?** € 14.44 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/399266709-external-power-supply-box-with-2-5mm-and-3-5mm)

## Best For

- homeyuer enthusiasts

## Why This Product

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

## Key Features

- • **Universal Safe Access:** Works seamlessly with keypad safes, gun safes, and key safes.
- • **Dual Jack Compatibility:** Supports both 2.5mm and 3.5mm female plug connectors for versatile use.
- • **Reliable 6V Backup Power:** Keep your safe accessible even when internal batteries fail.
- • **Dedicated Customer Support:** One-on-one assistance ensures smooth setup and troubleshooting.
- • **Hassle-Free Battery Replacement:** Plug in external power to unlock and change internal batteries without locksmith fees.

## Overview

The HOMEYUER External Power Supply Box is a compact, plastic 6V backup battery holder designed to provide emergency power to safes with 2.5mm or 3.5mm female plug connectors. Compatible with keypad, gun, and key safes, it enables safe access during internal battery failure, allowing users to unlock and replace batteries without professional help. Measuring 8.75" x 2.5" x 0.75", it includes 4 AA battery slots and comes with dedicated customer support and a 1-year warranty.

## Description

Buy HOMEYUER External Power Supply Box with 2.5mm and 3.5mm Jack for Some Safe Box with External Battery Supply, 4 AA Battery Holder with Wires, 6V Backup Power Source for The Safe Box: Safe Accessories - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Worked as Intended - Worked exactly as intended. Was able to get into my safe and then change the batteries. Saved me from having to call a locksmith or buy a new safe
Review: Good quality - This item worked exactly as needed. We have a shelf that has a power supply like this however my husband miss placed it and the batteries in the shelf died. This worked perfectly to plug in and get the shelf to open without having to damage it,

## Features

- The external battery pack is suitable for all keypad with female plug connector.
- The battery pack will supply power to the module, allowing you to access the safe with your registered fingerprints or pass code to change the batteries.
- The external battery pack is for some safe box,gun safe,key safe with the female plug connector on keypad of safe box.
- In the event of battery failure, this External Battery Pack can be used to access the Safes by plugging it into the module on the safe.
- If you encounter any problems or difficulties, please contact us and we will provide one-on-one service to help you solve your problem.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09NN7VHSV |
| Best Sellers Rank | #48,604 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #91 in Safe Accessories |
| Brand | HOMEYUER |
| Brand Name | HOMEYUER |
| Color | gray |
| Customer Reviews | 4.5 out of 5 stars 160 Reviews |
| Global Trade Identification Number | 00765343661591 |
| Item Dimensions L x W x H | 8.75"L x 2.5"W x 0.75"H |
| Item Type Name | external battery pack |
| Manufacturer | HOMEYUER |
| Material | Plastic |
| Material Type | Plastic |
| Number Of Pockets | 1 |
| Product Dimensions | 8.75"L x 2.5"W x 0.75"H |
| UPC | 765343661591 |
| Unit Count | 1 Count |
| Warranty Description | 1 YEAR |

## Product Details

- **Brand:** HOMEYUER
- **Color:** gray
- **Material:** Plastic
- **Number Of Pockets:** 1
- **Product Dimensions:** 8.75"L x 2.5"W x 0.75"H

## Images

![External Power Supply Box with 2.5mm and 3.5mm Jack for Some Safe Box with External Battery Supply, 4 AA Battery Holder with Wires, 6V Backup Power Source for The Safe Box - Image 1](https://m.media-amazon.com/images/I/512l-OjzYXL.jpg)

## Questions & Answers

**Q: Will this work on sentrysafe H060ES?**
A: Size of the battery case was a match with my safe. Wiring was not, a couple changes and it worked great.

**Q: Anyone know the if the jack is 1.5mm or smaller?**
A: the jack only two kinds,one is 3mm,other is 1.5mm,you can used ruler to check the size.

**Q: Will this power a 2A4Life safe?**
A: yes

**Q: Will this battery backup work for an edge safe?**
A: It worked great to power up my Sentry Card Swipe safe.  Look in the owner’s manual (I found mine online) to see if/where the headphone-looking plug can fit in an edge safe.   All you need is to get the safe to have the power to open it, then you can change the inside batteries.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Worked as Intended
*by D***D on December 22, 2025*

Worked exactly as intended. Was able to get into my safe and then change the batteries. Saved me from having to call a locksmith or buy a new safe

### ⭐⭐⭐⭐⭐ Good quality
*by S***L on November 16, 2025*

This item worked exactly as needed. We have a shelf that has a power supply like this however my husband miss placed it and the batteries in the shelf died. This worked perfectly to plug in and get the shelf to open without having to damage it,

### ⭐⭐⭐⭐⭐ Worked great!
*by A***L on February 2, 2026*

Worked great! Our safe's battery died without giving us warning to change the batteries. This gadget worked great!

## Frequently Bought Together

- HOMEYUER External Power Supply Box with 2.5mm and 3.5mm Jack for Some Safe Box with External Battery Supply Like BARSKA Safe, 4 AA Battery Holder with Wires, 6V Backup Power Source for The Safe Box
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- Barska External Battery Pack – Backup Power for Biometric Fingerprint Safes, Compatible Only with Select Barska Models, Access During Battery Failure

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*Product available on Desertcart Germany*
*Store origin: DE*
*Last updated: 2026-02-28*