The Therm-ic S-Pack 1400B is Therm-ic's high-capacity rechargeable battery pack for compatible heated socks, combining extended heating performance with convenient Bluetooth control. The two-battery set allows you to adjust your heating level from your smartphone using the Therm-ic Heat Control app, while three heat levels can also be controlled directly from the battery.
Designed for winter sports and outdoor activities, the S-Pack 1400B provides up to 16 hours of heat on the lowest setting, with up to 8 hours on the medium setting and up to 5 hours on the highest setting. The batteries attach easily to compatible Therm-ic Powersocks and are designed to provide consistent warmth throughout cold-weather activities.
The pack includes two rechargeable S-Pack 1400B batteries and a USB charging cable, allowing both batteries to be charged simultaneously. A mains wall adapter is not included
In a nutshell:
- Pack of two S-Pack 1400B batteries
- Controllable via Bluetooth on your smartphone
- Heating time level 1: up to 16 hours
- Heating time level 2: up to 8 hours
- Heating time level 3: up to 5 hours
- S-Pack batteries are compatible with Therm-ic Powersocks
- Pack includes a USB charger to charge both batteries simultaneously

List of compatible heated socks:
The S-Pack 1400B battery is designed to be used with our Therm-ic heated ski and outdoor socks. Here is the list (from the oldest to the newest):
Heated ski socks :
- Powersocks Heat Men ND
- Powersocks Heat Women ND
- Powersocks Heat Uni ND
- Powersocks Heat Fusion Uni
- Powersocks Heat Fusion Men
- Powersocks Heat Fusion Women
- Powersocks Heat Fusion Uni ND
- Ultra Warm Comfort S.E.T®
- Ultra Warm Performance S.E.T®
Outdoor Heated Socks :
- Powersocks Heat Multi
- Powersocks Heat Multi ND
- Powersocks Heat Fusion Outdoor
Specifications:
Heating time: 16h
Colors: Black
Connected: Yes
Charging time: 5-7h
Type: Batteries & heating accessories
Activities: Ski
Maintenance:
- Store batteries in a cool place (5°/41°F to 20°/68°F)
- Batteries should be half charged before storage
- Disconnect batteries from socks before storage/cleaning
- Clean the batteries with a soft cloth slightly dampened with a mild detergent