QualityCheck Consumer Test 2025

Our products were tested by the independent QualityCheck Institute and received an overall rating of “Excellent (4.8 out of 5.0 stars)” . This result confirms the outstanding quality, durability, and reliability of our products.

  • Battery Pair for Heated Socks, 2 × 4,000 mAh
  • Battery Pair for Heated Socks, 2 × 4,000 mAh – view 2
  • Battery Pair for Heated Socks, 2 × 4,000 mAh – view 3
  • Battery Pair for Heated Socks, 2 × 4,000 mAh – view 4
  • Battery Pair for Heated Socks, 2 × 4,000 mAh – view 5
  • Battery Pair for Heated Socks, 2 × 4,000 mAh – view 6
  • Battery Pair for Heated Socks, 2 × 4,000 mAh – view 7
  • Battery Pair for Heated Socks, 2 × 4,000 mAh – view 8
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Jess and 10,000+ other people have shopped with us this year
Jess and 10,000+ other people have shopped with us this year

Power Bank Pair for Heated Socks — 3.7V / 2A, 2×4,000 mAh

Power Bank Pair for Heated Socks — 3.7V / 2A, 2×4,000 mAh

$44.90
$49.90 $44.90
- 10% 🎃 Sold out
You save a total of $5.00

You save $5.00 · Free shipping

Reliable warmth for your heated socks — compact battery pack pair (2×4,000 mAh) with stable 3.7V/2A output per pack.
  • ✔ Ultra-compact & lightweight: fits the battery pocket — barely noticeable
  • ✔ Pair system: one battery per sock for even warmth for hours
  • ✔ Safe & certified: CE/FCC/RoHS; protection against overcharge, overcurrent, and short circuit
  • ✔ Easy USB charging: 5V/1A, charging cable included

Reliable warmth for your heated socks — compact battery pack pair (2×4,000 mAh) with stable 3.7V/2A output per pack.

  • Ultra-compact & lightweight: fits the battery pocket — barely noticeable
  • Pair system: one battery per sock for even warmth for hours
  • Safe & certified: CE/FCC/RoHS; protection against overcharge, overcurrent, and short circuit
  • Easy USB charging: 5V/1A, charging cable included
High Demand – Last Limited Edition

High Demand – Last Limited Edition

Goes well with this

Thermal Insoles Thermal Insoles Keep your feet warm – no power needed $34.90

Update as of —:

Due to our Halloween Sale, only a few items are left in stock.

Expected to sell out: TOMORROW

Update as of October 30, 2026

Halloween Sale: only a few items left in stock

Expected to sell out: TOMORROW

Product description

Warm feet need power – on both sides. This battery set gives each sock its own 4,000 mAh battery, so both feet stay evenly warm.

What you get

  • 2 × 4,000 mAh – 8,000 mAh in total for long days outside
  • 3.7 V and up to 2 A per battery – for heated products with a 3.7 V system, such as heated socks
  • Compact and light – disappears into the sock's battery pocket
  • Protection circuits – against overcharging, overcurrent and short circuit
  • USB charging – at 5 V / 1 A, charging cable included

Good to know

Made for our heated socks. Use only with compatible heated products with a 3.7 V system – the connector is made for exactly that.

Frequently asked questions

Will the batteries fit my heated socks?

They are made for our heated socks and other heated products with a 3.7 V system. Please do not use them with other systems.

Why two batteries?

Each sock gets its own 4,000 mAh battery, so both feet stay evenly warm.

How do I charge the batteries?

Via USB with 5 V / 1 A. The charging cable is included.

Specifications

  • Capacity: 2 × 4,000 mAh (3.7 V nominal), 8,000 mAh in total
  • Output: 3.7 V / up to 2 A per battery
  • Input: 5 V / 1 A via USB
  • Connector: for compatible 3.7 V heated products

In the box

2 × battery (4,000 mAh each), 1 × USB charging cable

Product description

Warm feet need power – on both sides. This battery set gives each sock its own 4,000 mAh battery, so both feet stay evenly warm.

What you get

  • 2 × 4,000 mAh – 8,000 mAh in total for long days outside
  • 3.7 V and up to 2 A per battery – for heated products with a 3.7 V system, such as heated socks
  • Compact and light – disappears into the sock's battery pocket
  • Protection circuits – against overcharging, overcurrent and short circuit
  • USB charging – at 5 V / 1 A, charging cable included

Good to know

Made for our heated socks. Use only with compatible heated products with a 3.7 V system – the connector is made for exactly that.

Frequently asked questions

Will the batteries fit my heated socks?

They are made for our heated socks and other heated products with a 3.7 V system. Please do not use them with other systems.

Why two batteries?

Each sock gets its own 4,000 mAh battery, so both feet stay evenly warm.

How do I charge the batteries?

Via USB with 5 V / 1 A. The charging cable is included.

Specifications
  • Capacity: 2 × 4,000 mAh (3.7 V nominal), 8,000 mAh in total
  • Output: 3.7 V / up to 2 A per battery
  • Input: 5 V / 1 A via USB
  • Connector: for compatible 3.7 V heated products

In the box

2 × battery (4,000 mAh each), 1 × USB charging cable

View full details

Battery Pair for Heated Socks, 2 × 4,000 mAh – view 2

More Runtime for Warm Feet


Two 4,000 mAh batteries deliver constant 3.7V warmth for your heated socks. Simply charge via USB, CE/FCC/RoHS certified, compact and lightweight.

What Is the Naturwide Guarantee? 🌿

Since the founding of Naturwide, quality, functionality, and customer satisfaction have been our top priorities. Our outdoor products are designed to help you get the most out of your adventures – reliable, durable, and practical.

With a customer satisfaction rate of 94.2% and countless 5-star reviews, we are fully committed to providing you with high-quality gear that supports and excites you on your journeys. That’s why we offer a no-questions-asked satisfaction or money-back guarantee.

More Runtime for Warm Feet

More Runtime for Warm Feet


Two 4,000 mAh batteries deliver constant 3.7V warmth for your heated socks. Simply charge via USB, CE/FCC/RoHS certified, compact and lightweight.

The Naturwide Guarantee 🌿

Since the founding of Naturwide, quality, functionality, and customer satisfaction have been our top priorities. Our outdoor products are designed to help you get the most out of your adventures – reliable, durable, and practical.

With a customer satisfaction rate of 94.2% and countless 5-star reviews, we are fully committed to providing you with high-quality gear that supports and excites you on your journeys. That’s why we offer a no-questions-asked satisfaction or money-back guarantee.

100% money-back guarantee
  • Ultralight Sleeping Pad with Built-in Foot Pump – Green
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More Space for Shared Adventures? 🏕️✨Then our double sleeping pad is just perfect for you.

View full details

Our Story – How Naturwide Was Born

We are Andrew & Brian, two passionate outdoor enthusiasts who have long seen nature as a space for escape and adventure. But one thing always bothered us: many outdoor products are either overpriced, poor in quality, or just not well thought out.

Read more about us →
Andrew & Brian · Founders
Andrew & Brian · Founders

Our Story – How Naturwide Was Born

We are Andrew & Brian, two passionate outdoor enthusiasts who have long seen nature as a space for escape and adventure. But one thing always bothered us: many outdoor products are either overpriced, poor in quality, or just not well thought out.

Read more about us

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What our customers say

4.3 from 20 reviews

Customer Reviews

Overall rating: 4.3 / 5 from 20 reviews.

We eventually figured it out however my feedback is the battery packs need to come with some basic instructions. Or at a minimum include basic “how to operate” instructions on your website page. Thank you

Scott D. 4/5 Verified

Power Bank Pair for Heated Socks — 3.7V / 2A, 2×4,000 mAh

They work really well and warm your feet really well, but are really big and kind of heavy. I didn't realize that when ordering them for my heated socks, so just a heads up there when you are ordering.

Emily D. 3/5 Verified

Power Bank Pair for Heated Socks — 3.7V / 2A, 2×4,000 mAh

They are just batteries. Not much to love or hate on this one. I do wish that they would come with the heated socks I bought since the socks only work with a battery. Nonetheless the socks work great. The batteries do their job.

Kenton O. 3/5 Verified

Power Bank Pair for Heated Socks — 3.7V / 2A, 2×4,000 mAh