Alpenwarm battery pair for heated socks: two black 4,000 mAh batteries

Our heated socks and heated knee socks run on 3.7 V. Each sock gets its own battery in the cuff pocket. Both socks already come with one pair – this is the second.

  • As a second set for long days
  • As a spare if a battery goes missing
  • One battery per sock

Up to 10 hours with the heated socks or knee socks.

Technology

  • 2 × 4,000 mAh
  • 3.7 V, 2 A output
  • Protection against overcharging, overcurrent and short circuits

Charging

  • Via USB with the included cable
  • For example from a USB wall charger
  • What's included: 2 batteries, 1 USB charging cable

Fits

  • Heated socks
  • Heated knee-high socks
  • For the vest, jacket, hoodie and touchscreen gloves: 5,000 mAh power bank

Charge both batteries in the evening, put them in the sock cuff pockets in the morning and connect them.

  • Don't charge inside the sock.
  • Remove before washing.
  • One battery per sock.

With two pairs you swap batteries at lunch and stretch long days.

114 reviews

Spare Batteries for Heated Socks 2 × 4,000 mAh, 3.7 V

The second set for our heated socks and knee socks – for long days or as a spare.

  • 2 × 4,000 mAh, 3.7 V
  • For heated socks and knee socks
  • Charges via USB, cable included
  • Overcharge and short-circuit protection

What's included: 2 batteries, 4,000 mAh · USB charging cable

$109.90$159.90Save $50.00 (31%)

Tax includedFree shipping

In stock, ships now

Tracked shipping Support within 24 hours
100% Money Back Guarantee Order risk-free: If you don't love it, you get your money back in full.
Warning: low stock
This product is in high demand this winter and our stock is running low. Once it sells out, it takes a long time before we can produce it again – so it's best to secure yours now.

At a glance

Two batteries, one pair of warm feet

  • 2 × 4,000mAh

    Capacity

    One battery per sock

  • 3.7V

    Voltage

    For heated socks

  • 2A

    Output

    Per battery

  • 10h

    Up to 10 hours

    With the heated socks or knee socks

Two sock batteries charging via USB on a kitchen table in the morning

Charging

Charge at night, warm in the morning

Both batteries charge via USB with the cable from the box. Take them out of the sock to charge.

  • Cable includedUSB charging cable in the box.
  • Protection circuitAgainst overcharging, overcurrent and short circuits.
  • Up to 10 hoursWith the heated socks or knee socks.

Details

Made for the sock cuff pocket

Battery going into the cuff pocket of the heated sock at a car tailgate

One battery per sock

Slip in, connect, choose a level.

2 × 4,000 mAh

3.7 V, 2 A output.

Protection circuit

Against overcharging and short circuits.

USB charging

The cable is included.

Second set

Swap at lunch, stay warm longer.

Fits our heated socks and knee socks

Both socks run on 3.7 V and have a cuff pocket for one battery each.

Alpenwarm battery pair for heated socks: two black 4,000 mAh batteries

What's included

Two batteries and a cable

Charge, slip into the cuff pockets, connect.

  • 2× Battery, 4,000 mAh, 3.7 VOne per sockIm Preis enthalten
  • 1× USB charging cableFor charging the batteries

For heated socks and knee socks. The socks already come with one pair – this is the second.

Frequently asked questions

  • For our heated socks and knee socks. Both run on 3.7 V and have a cuff pocket for one battery each.

  • Yes. You only need this pair as a second set for long days or as a spare.

  • Up to 10 hours with the heated socks or knee socks.

  • No. Take them out of the pocket to charge – and before washing.

  • You need a USB port to charge, for example a USB wall charger. The cable is included.

  • No. The vest, jacket, hoodie and touchscreen gloves run on the Alpenwarm 5,000 mAh power bank.

  • 5 stars: 114 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
K
Kelechi

The batteries are well suited for longer outdoor activities.

E
Emeka

I like the amount of runtime they provide for their size.

K
Katrín

Great for keeping my feet comfortable during cold-weather activities.

R
Ravi

They have been dependable on several outdoor trips.

J
Jakob

These 4000mAh batteries are perfect for keeping my heated socks powered.

E
Emrys

Very convenient for travel and outdoor adventures.

N
Na

Very practical for hiking and winter activities.

C
Carl

I have had a great experience using them.

S
Sofia

The 4000mAh size works perfectly for my heated socks.

H
Harini

They are compact enough to fit comfortably in my gear.

L
Liya

They provide steady and reliable performance.

V
Viktor

The battery life is exactly what I was hoping for.

F
Fang

The battery performance has been consistent and dependable.

E
Elena

Very useful for keeping heated socks running on chilly days.

K
Khang

Very convenient for keeping my feet warm outdoors.

E
Ella

I like how easy they are to carry in my bag.

A
Anna

These batteries are exactly what I needed for my heated socks.

O
Orla

Great choice for anyone using heated socks regularly.

S
Sofia

The battery life has been excellent for my outdoor use.

N
Nina

They keep my heated socks powered without any hassle.

A
Anna

They are a great match for my heated socks.

M
Ming

They recharge easily and work reliably.

E
Ella

They are easy to pack and carry.

L
Lorik

Great batteries for camping and winter adventures.

K
Katrín

They are easy to install and use.

N
Ntsika

I like having a spare set for longer days outside.

N
Namfon

I am happy with the balance of capacity and portability.

N
Nika

The batteries hold a good charge and provide steady power.

S
Seung-min

I love having reliable power for my heated socks.

D
Daiki

They provide enough energy for my usual time outside.

N
Nika

I am very satisfied with how long they last.

S
Segun

The batteries have held up well with regular use.

A
Ayanda

I like the simple and practical design.

E
Elias

I have been very happy with how well these batteries work.

W
William

The batteries have made my heated socks much easier to use.

Alpenwarm battery pair for heated socks: two black 4,000 mAh batteries

For long days

The second set for your socks

  • 2 × 4,000 mAh, 3.7 V
  • For heated socks and knee socks
  • Free shipping

$109.90

Choose now

Customer Reviews

Overall rating: 5.0 / 5 from 114 reviews.