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Hotronic Battery Pack Power Plus S4+

Hotronic Battery Pack Power Plus S4+Hotronic Battery Pack Power Plus S4+

Hotronic Battery Pack Power Plus S4+

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With four (4) cells in each Battery Pack, the Power Plus S4 is Hotronic's most powerful, longest lasting Battery Pack! The new Hotronic S Series Footwarmers offer more 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.Hotronic Battery Pack Power Plus S4


The following Hotronic Heat Socks XLP Series models are covered under the following Hotronic Limited Warranty.

Hotronic Heat Socks XLP Series Models and Production Years:

  • Heat Socks XLP ONE (2016-2017)


The Hotronic Heat Socks XLP ONE carries a limited warranty of two (2) years from the date of purchase for the Heat Socks XLP ONE. This limited warranty shall only apply to original purchasers who bought the new Heat Socks XLP ONE from an authorized retailer. Dated proof of purchase must be provided. Hotronic will only replace or repair parts of the Heat Socks XLP ONE which are defective as a consequence of workmanship or material defects. This limited warranty does not extend to damage ascribed to improper use, negligence, misuse, or any use not included in the operating instructions. Furthermore, the following are excluded from the warranty: normal deterioration, change in appearance e.g. color, breakage (with the exception of a specific breakage caused by manufacturing defects), improper maintenance by the retailer or purchaser, improper product modifications performed by the retailer or purchaser, product loss as a consequence of poor fastening, normal temperature deviations per heat setting or deviations regarding the product's heating duration on a certain heat setting after charging which results from the battery charging process or the conditions in which the Heat Socks XLP ONE are used and tolerances of the Battery Packs XLP ONE's batteries and electronics.

This limited warranty is the only warranty issued to the purchaser.

Other express or implicit warranties are not accepted. Neither WINTERSTEIGER nor the retailer is liable for incidental or consequential damage of any kind which can be ascribed to the use or possession of the Heat Socks XLP ONE.

If a defect emerges with the Heat Socks XLP ONE during the limited warranty period, the owner should promptly return the product to an authorized retailer. Dated proof of purchase must be provided. If the Heat Socks XLP ONE or part of them are replaced or repaired, the warranty period for the replacement product/part or the repaired product/part corresponds to the remaining term of the original limited warranty from the date of purchase of the original Heat Socks XLP ONE.

Whether you are looking to maintain comfort and warmth in your feet or keep your boots, shoes, gloves, and mittens dry, Hotronic has the solution to meet your needs.

Product Reviews

Review Summary
11 Reviews
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100% Recommend this product (11 of 11 responses)
By Deborah
Can't ski w/o 'em!
April 26, 2023
I have to have these to heat my feet even on a 30 degree + day. They say it's Renauld's Syndrome...I say it's cold feet. My hands and feet are cold as soon as the temps decrease to 60 degrees unless I'm moving fiercely.
  • Last long enough for skiing 3 hours or so. Put your cuff over the batteries so you don't loose them!
  • On high you need 2 paks to get through the ski day.
By Rick
Best Battery Pack Ever!
April 21, 2023
This is my 4th set of batteries for my Hotronic ski boot warmers. This is the longest lasting and best battery pack I have owned!
By Elton
Big Sky
Replacement Hotronic batteries
April 13, 2023
Good price, fast delivery, and works fine.
By Keith
Altamont, NY
Work great
April 7, 2023
Wife needed new batteries for her boot heaters. They were 5-7 years old and wouldn’t last the whole day. These batteries came pre-charged. Topped them off and away she went. Now she can go the whole day without cold feet!
By Georgeanne
Incline Village, NV
Good heating
March 30, 2023
Bought these to replace my old set which has reached the end of its life. Hopefully these last at least as long as the old set which are 7 years old. I ski over 25 days per year snd couldn’t without my hotronics.