---
product_id: 82581378
title: "9v Battery Eliminator (9v DC Adapter & Battery Eliminator) - Replace Your 9-Volt Batteries with Wall Power Supply"
brand: "protechtrader"
price: "€ 31.86"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.es/products/82581378-9v-battery-eliminator-9v-dc-adapter-and-battery-eliminator-replace
store_origin: ES
region: Spain
---

# 500mA output power 3.5ft (42in) long cord Eco-friendly battery replacement 9v Battery Eliminator (9v DC Adapter & Battery Eliminator) - Replace Your 9-Volt Batteries with Wall Power Supply

**Brand:** protechtrader
**Price:** € 31.86
**Availability:** ✅ In Stock

## Summary

> 🔋 Power Up Smart, Save Big Forever!

## Quick Answers

- **What is this?** 9v Battery Eliminator (9v DC Adapter & Battery Eliminator) - Replace Your 9-Volt Batteries with Wall Power Supply by protechtrader
- **How much does it cost?** € 31.86 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/82581378-9v-battery-eliminator-9v-dc-adapter-and-battery-eliminator-replace)

## Best For

- protechtrader enthusiasts

## Why This Product

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

## Key Features

- • **Long Reach, No Limits:** Generous 3.5ft cord lets you power devices anywhere near an outlet.
- • **Save Hundreds Annually:** Slash recurring battery costs with a one-time adapter investment.
- • **Universal Compatibility:** Works seamlessly with any device using a 5.5mm x 2.1mm DC barrel jack, center positive.
- • **Endless Power, Zero Waste:** Ditch disposable 9V batteries and plug into continuous wall power.
- • **Perfect Gift for the Practical:** Ideal for tech-savvy friends who value sustainability and savings.

## Overview

The 9V Battery Eliminator Kit replaces disposable 9-volt batteries with a reliable 9V AC/DC adapter delivering 500mA output through a 3.5ft cord and compatible DC barrel connector. Designed for devices with a 5.5mm x 2.1mm center-positive jack, it offers an eco-friendly, cost-saving alternative to batteries, ideal for electronics, toys, and radios.

## Description

Full description not available

## Features

- 9v Battery Eliminator / Replacement Kit - Replace Your 9 Volt Batteries Forever and Save Money
- 9v Battery Eliminator Kit Includes Both: 9v AC/DC Adapter With 500ma Output and Matching Dc Barrel Connector Jack With a 3.5ft (42in) Cord
- 9v Battery Eliminator Connector (Available Individually or as Part of the Kit) Designed to Work With Your Compatible 9v DC Adapter - Please Note: Your Adapter Must Have a Comparable 5.5mm X 2.1mm DC Barrel Jack With Tip Center Positive Polarity and approximately 6.25in
- Long Term Green Solution Saves Time and Money Allowing You to Operate Electronics, Toys, Radios, and Much More From the Included AC Wall Transformer. Save 100's of Dollars Every Year on 9v Batteries
- Please Note: When Using the 9v Adapter With Some Musical or Radio-based Electronics That Contain a Speaker There is a Chance That Line Noise or Electrical Interference May Be Heard Through Your Speaker.
- Perfect White Elephant, Pollyanna, Secret Santa Gift Idea for the Holidays!

## Product Details

- **Brand:** ProTechTrader
- **Connector Type:** DC barrel connector, 9V battery snap connector
- **Compatible Devices:** Toys, Walkie Talkies, Transistor Radios, other gadgets powered by 9 Volt Batteries
- **Included Components:** 9v DC Adapter, Battery Eliminator
- **Special Feature:** Lightweight Design
- **Input Voltage:** 9 Volts
- **Amperage:** 500 Milliamps
- **Wattage:** 10 watts
- **Number of Items:** 1
- **Output Current:** 500 Milliamps

## Images

![9v Battery Eliminator (9v DC Adapter & Battery Eliminator) - Replace Your 9-Volt Batteries with Wall Power Supply - Image 1](https://m.media-amazon.com/images/I/81BZgqj78-L.jpg)
![9v Battery Eliminator (9v DC Adapter & Battery Eliminator) - Replace Your 9-Volt Batteries with Wall Power Supply - Image 2](https://m.media-amazon.com/images/I/61kJbwn609L.jpg)
![9v Battery Eliminator (9v DC Adapter & Battery Eliminator) - Replace Your 9-Volt Batteries with Wall Power Supply - Image 3](https://m.media-amazon.com/images/I/71aubSfLiML.jpg)
![9v Battery Eliminator (9v DC Adapter & Battery Eliminator) - Replace Your 9-Volt Batteries with Wall Power Supply - Image 4](https://m.media-amazon.com/images/I/81WASdcMc0L.jpg)
![9v Battery Eliminator (9v DC Adapter & Battery Eliminator) - Replace Your 9-Volt Batteries with Wall Power Supply - Image 5](https://m.media-amazon.com/images/I/71Y5d7m6mnL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Could someone post how many amps this puts out?**
A: Sure, happy to help.  Our 9 volt battery replacer / eliminator kit outputs 0.5 amps or 500ma which should cover any 9v battery powered device.

**Q: A previous question was already answered about the power cord length. How long is the snap connector cord?**
A: The length of the Eliminator Connector is approximately 6.25in

**Q: will this work with "the basement watchdog model bwd-hwa 110 db battery operated water alarm"?**
A: If it's a 9v battery powered device, and you can leave the battery compartment open, it should work fine. The eliminator can supply a lot more current, for longer, than a battery can. It's also always steady at 9v, at reasonable current draw.

**Q: Why doesn't it work on my garage door opener?**
A: Hello, we would be happy to help you figure out this issue, but we would need more details such as what was the normal power source for your garage door opener?   Was it originally a 9v battery?    When happens when you try to use the eliminator with it?    Please contact us directly, and if possible send a picture of your setup and we will be more then happy to help you troubleshoot the issue more as out 9-volt battery eliminator should be able to replace 9v batteries in nearly all products that it is able to be connected to without issue.   That said we are a small company focused on customer satisfaction so do not hesitate to reach out to us at cs@protechtrader.com

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works well-- correct DC polarity not an issue
*by D***R on February 28, 2024*

I've checked, and if the two-part plug-in substitute for a 9v battery is used as a kit there shouldn't be any polarity problem. The AC/DC converter plug prongs are reversible, because AC cycles back and forth, and for this purpose the converter doesn't care which prong the AC comes from. The DC polarity at the point of connection where the the adapter attaches instead of the 9V battery will always be right -- male pole positive. The seller explained to me that polarity can be wrong if an AC/DC adapter with a purposefully different DC polarity -- like for a guitar pedal -- is substituted for the converter that comes with the 2-part kit.

### ⭐⭐⭐⭐⭐ Just what I needed at a great price
*by G***G on April 11, 2019*

I bought two sets of these battery eliminators and power supplies to use for a couple old DOD FX series guitar pedals I bought recently. Since the power port on the pedals was old and obsolete, I decided to use these to attach to the battery connection. They worked well in powering the pedals and did not hinder the sound as poor power supplies can. The shape of the plug was also nice since I could fit the two on a power strip side by side. I cannot comment on the longevity of this product since I have had these for less than a month, but the longer they last, the happier I will be with them.

### ⭐⭐⭐⭐ Super charged!
*by K***N on May 10, 2023*

It is performing as it should no issues with the product. Would recommend.

## Frequently Bought Together

- 9v Battery Eliminator (9v DC Adapter & Battery Eliminator) - Replace Your 9-Volt Batteries with Wall Power Supply
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**Shop now:** [https://www.desertcart.es/products/82581378-9v-battery-eliminator-9v-dc-adapter-and-battery-eliminator-replace](https://www.desertcart.es/products/82581378-9v-battery-eliminator-9v-dc-adapter-and-battery-eliminator-replace)

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*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-02-26*