---
product_id: 12046712
title: "Hotronic FootWarmer S4 Universal"
brand: "hotronic"
price: "€ 20.20"
currency: EUR
in_stock: false
reviews_count: 11
url: https://www.desertcart.es/products/12046712-hotronic-footwarmer-s4-universal
store_origin: ES
region: Spain
---

# 14.21x9.29x2.09 in Includes battery 0.92 kg Hotronic FootWarmer S4 Universal

**Brand:** hotronic
**Price:** € 20.20
**Availability:** ❌ Out of Stock

## Summary

> 🔥 Step into Comfort, Step into Style!

## Quick Answers

- **What is this?** Hotronic FootWarmer S4 Universal by hotronic
- **How much does it cost?** € 20.20 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/12046712-hotronic-footwarmer-s4-universal)

## Best For

- hotronic enthusiasts

## Why This Product

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

## Key Features

- • **Durable Design:** Built to withstand the rigors of daily use, ensuring long-lasting warmth.
- • **Effortless Operation:** Simple controls make it easy to adjust your comfort level on the fly.
- • **Universal Fit for All:** Perfectly tailored to fit any shoe, ensuring comfort and warmth wherever you go.
- • **Lightweight & Portable:** Weighing just 0.92 kg, take your warmth on the go without the bulk.
- • **Stay Warm, Stay Active:** Experience unparalleled warmth with the Hotronic FootWarmer S4, designed for the active professional.

## Overview

The Hotronic FootWarmer S4 Universal is a premium heated insole kit designed to provide exceptional warmth and comfort. With a lightweight design and universal fit, it’s perfect for anyone looking to stay cozy during outdoor activities or in chilly environments. The kit includes a battery for easy operation, making it a must-have for the modern professional.

## Description

Hotronic's Footwarmer S4 Universal boot warmers give a boost of warmth to ski boots, snow boots, work boots or even a regular pair of sneakers. You can cut the Heat Ready insole to fit any footwear and the Heating Elements stick to the toes or heels for warmth where you need it most. The battery packs provide almost an entire day's worth of warmth. Self-adhesive covers and strips make the setup easy and quick so you can maintain toasty toes all winter long. Included with Hotronic S4 Universal Heating System: 2 Battery Packs S4 with Integrated Heat Regulator 1 Pair of Heating Elements with Self-Adhesive Fabric Covers and Strips 1 Pair of Hotronic One Size Heat Ready Insoles 1 Wall Charger (global input 100-240VAC, 50/60Hz) with North American and European Plug Adapters Operating Instructions and Warranty Card. The Hotronic S Series offer more versatility and higher performance than ever before. With enhanced reliability and longevity, the new S Series batteries maintain up to 55% of a full charge and 95% of their initial capacity after four years of non- use! Plus, an increase in capacity offers up to a combined 30% in higher average temperatures and longer duration on a single full charge, all when needed most, in the cold. With four (4) cells in each Battery Pack, the Power Plus S4 is Hotronic's most powerful, longest lasting Foot Warmer! HOTRONIC FOOTWARMING SYSTEM Easily installs in all types of footwear. Transfers simply from one pair of footwear to another. Use while skiing, snowboarding, bicycling, horseback riding, fishing, and during other general cold-temperature activities. HOTRONIC’S BATTERY PACK S4 Powered by high capacity, cold temperature operation, NiMH cells. Four (4) temperature-duration settings. Settings adjusted by easy to use, push-button controls. Easy to read Battery Pack LEDs indicate setting selected and power on / off. Battery Packs easily attach to secure area of footwear. Battery Packs S4 contain four (4) cells for extende

## Features

- Hotronic Power Plus S4 Universal Foot Warmer Heated Insole Kit

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Item Package Dimensions L x W x H | 14.21 x 9.29 x 2.09 inches |
| Package Weight | 0.92 Kilograms |
| Item Dimensions  LxWxH | 15 x 9 x 2 inches |
| Item Weight | 16 Ounces |
| Brand Name | Hotronic |
| Model Name | FBA_1031 |
| Color | Black |
| Manufacturer | Hotronic |
| Part Number | FBA_1031 |
| Included Components | Battery |

## Images

![Hotronic FootWarmer S4 Universal - Image 1](https://m.media-amazon.com/images/I/71MWeBnQVVL.jpg)
![Hotronic FootWarmer S4 Universal - Image 2](https://m.media-amazon.com/images/I/51v1wHYWasL.jpg)
![Hotronic FootWarmer S4 Universal - Image 3](https://m.media-amazon.com/images/I/51B+zb76AcL.jpg)
![Hotronic FootWarmer S4 Universal - Image 4](https://m.media-amazon.com/images/I/71QrOO0ZtpL.jpg)
![Hotronic FootWarmer S4 Universal - Image 5](https://m.media-amazon.com/images/I/41zBFtsU7ZL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Purchased in 2018 and still going strong!!!  Happy warm feet!!!
  

*by J***A on Reviewed in the United States on January 4, 2021*

Purchased and installed in 2018.  Still going strong.Easy set up. Instead of using the insoles with the ski boot, the included insoles with channel for cable management made install a breeze.Instructions were easy to follow.Before you install insole back into boot liner, you have to make a “T” incision/cut at the heal of the boot liner at the rear, near the base. Do not cut at the stitching but next to it. FYI - The formed insoles route the cables to the outboard side of the heal so cut the “T” to the outboard of the stitching.  This incision/cut will allow you to push through the cable which will then have you route up the cable on "outside" of the boot liner. I also duct taped the cable to the boot liner to secure it from moving . Replaced the liner back into the boot and that’s it. It says to charge 24-72 hrs prior. We set them up and charged for about 15 hrs.  Wife said they worked fine. She had the low setting so batteries weren’t getting drained as fast.We also bought the optional battery holder which provided better security for the battery as it clips securely to the boot strap and doesn’t slide off as with the original battery boot clip.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Works great - feet don't get cold
  

*by M***R on Reviewed in the United States on February 14, 2016*

These worked great in my old cold ski boots.  It doesn't make your feet extremely hot - but you don't feel cold at all.  Best thing I can say is that even on cold days, with these in my boots, I didn't think about my feet.I highly recommend them.It did take us about an hour to figure out how to put them into the boots (the instructions could be a lot better).  Now that I've done this once, I think I could install them in about 15 minutes.I also suggest getting the Hotronic Slide Strap Brackets for mounting the batteries easily to the straps on your boots.The only negative thing I can think of is that I wish they were cheaper - but, then again, I wish everything was cheaper.  When I'm skiing with these on during a very cold day, I think they are worth every penny. I'm about to buy 2 more sets for my daughter's and wife's boots.

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    Warm Feet, Frustrated by Lost Battery & Poor Color Choice
  

*by D***A on Reviewed in the United States on February 12, 2017*

These definitely work and keep feet warm, and they should for $160. I would like to warn everyone that the 4th time I used them, I lost one of the batteries. It didn't stay on securely. I tried to retrace my runs from skiing and didn't find it. I think it is so dumb they are white, don't most people use them skiing?? Why not neon green or orange...oh its is because they want you to buy a $60 replacement one...anyhow, after asking every week at the lost and found, it finally showed up but with the back clip gone. SO now I am looking at spending another $11 on "strap brackets". I will review those after I give them a try. For the money, I think hotronic could be doing better by their customers.

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*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-03-21*