Hotronics S4+ Series Power Plus Footwarmers offer more reliability, longevity, and performance over the previous M Series and E Series batteries. The new S4+ Series batteries maintain up to 55% of a full charge and 95% of their initial capacity. Even after four years of non-use! Plus, an increase in capacity offers a combined 30% in higher average temperatures and longer durations on a single full charge!
Hotronic S4+ Series Footwarmer Power Plus Set features...
HOTRONIC S4+ SERIES BATTERIES High capacity, cold temperature operation, 4 NiMH cells with four temperature settings which are adjusted by the easy to use top mounted push buttons
The easy to read LED lights indicate the battery settings you select
The S4+ Series batteries can easily attach to any footwear with the battery clip
S4+ Series batteries have NiMH technology and do not have memory effect. These batteries do not require full discharge before recharging.
S4+ Battery Temperature and Duration Setting #1- 84 - 98 F, 29 - 37 C, lasts 16.5 - 21 hrs
Setting #2- 107 - 121 F, 42 - 49 C, lasts 7 - 10.5 hrs
Setting #3- 122 - 138 F, 50 - 59 C, lasts 5 - 7.5 hrs
Setting #4- 158 - 173 F, 70 - 78 C, lasts 2.5 - 4.5 hrs
Duration is based on battery pack in ambient temperatures of -22 to -15 C and -9 to +4 F.
The Battery Recharger Works with all E Series, M Series ans S Series batteries
Includes advanced global charging technology with 2 plug adapters so you can use the charger in North American and European without a power convertor.
Charger offers overcharge protection and has an input range of 100V - 240V.
Batteries normally recharge in less than 3 hours and the chargers LED lights indicate mode and battery charge status
What You'll Receive with your Purchase. TWO S4+ Series battery packs with Integrated Heat Regulator and clips to attache to your boots and or shoes.
ONE battery recharger with a global input 100 - 240VAC, 50/60Hz and includes North American and European plug adapters.
ONE Hotronic operations booklet.
Hotronic TWO Year Warranty Hotronic warrantys their product for 2 years from date of purchase!
Our comments; For the small difference in price between the S3 Series and the S4 Series, we feel the S4+ is the better value because you can use a higher heat setting for all day heat. And Hotronic is the only company with a two year warranty.
Highly recommend Alpine Accessories. Customer service was able to answer all my boot heaters questions and got my order to me in two days with regular ground shipping. And now my feet are warm.
- Jeff B, IL
Alpine knows boot heaters!
With so many options, I wasnt sure which to get so I called. I spoke to Rich. He knows boot heaters!! He asked me a few questions on how I was going to use them and made 2 recommendations. I selected the Hotronic because they had a 2 year warranty. You never know if youll need it. I also got free shipping and didnt have to pay sales tax. Ill be back for more stuff from Alpine Accessories.