---
product_id: 10174469
title: "EnergyFlux Slim 4400mAh Rechargeable Double-Sided Hand Warmer / USB External Back Up Battery Pack Charger"
brand: "human creations"
price: "¥15575"
currency: JPY
in_stock: true
category: "Misc."
url: https://www.desertcart.jp/products/10174469-energyflux-slim-4400mah-rechargeable-double-sided-hand-warmer-usb-external
store_origin: JP
region: Japan
---

# EnergyFlux Slim 4400mAh Rechargeable Double-Sided Hand Warmer / USB External Back Up Battery Pack Charger

**Brand:** human creations
**Price:** ¥15575
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** EnergyFlux Slim 4400mAh Rechargeable Double-Sided Hand Warmer / USB External Back Up Battery Pack Charger by human creations
- **How much does it cost?** ¥15575 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/10174469-energyflux-slim-4400mah-rechargeable-double-sided-hand-warmer-usb-external)

## Best For

- human creations enthusiasts

## Why This Product

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

## Description

EnergyFlux Slim provides everything you've come to expect from the original EnergyFlux, keeping your hands warm and toasty at all times AND never letting your phone or other mobile devices run out of battery. With wrap-around aluminum casing, EnergyFlux Slim will provide even heat throughout the unit to keep both your palms and fingers warm at the same time.It can also serve you all year round as a backup battery. EnergyFlux Slim can charge digital products up to 5 times (depending on battery size of device being charged) before its own power is depleted, making it convenient for occasions when power sockets aren't easily accessible.What's New?With a slimmer but longer body, EnergyFlux Slim allows for a comfortable grip with more contact for those with wider palms. You could even keep one inside your hand muff to stay warm and toasty when out in the freezing cold.Additionally, to simplify things, EnergyFlux Slim now comes with one less charging chord. To charge your digital device, just plug the USB charging cable provided with your device straight into the unit. And, when you need to add more juice into EnergyFlux Slim, use the USB cable provided to plug it into your computer or USB adpater.Note:- It may take a little time for EnergyFlux Slim to heat up after being left out in the cold.- Heating times are extended by using any form of insulation (e.g. placing it in your gloves, pockets or scarf).Package Contents:- hand warmer (4.2 x 1.7 x 1 inches, 4.6oz)- micro B USB to USB cable to charge the hand warmer- pouch- user manual

## Features

- Warms on both sides of the unit to keep hands toasty
- Two temperature settings: 109F (approx. 5 hrs) and 120F (approx. 4 hrs) when in room temperature.
- Charges via USB digital products including mobile phones, MP3 players, digital cameras, etc.
- Rechargeable 4400mAh lithium-ion battery lasts up to 500 recharges
- Power indicating LED lights show remaining charge as well as heat setting

## Images

![EnergyFlux Slim 4400mAh Rechargeable Double-Sided Hand Warmer / USB External Back Up Battery Pack Charger - Image 1](http://ecx.images-amazon.com/images/I/41RZ6fqTofL.jpg)

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**Shop now:** [https://www.desertcart.jp/products/10174469-energyflux-slim-4400mah-rechargeable-double-sided-hand-warmer-usb-external](https://www.desertcart.jp/products/10174469-energyflux-slim-4400mah-rechargeable-double-sided-hand-warmer-usb-external)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-06-18*