We have been working on this for a few years. There are many people that need to stay warm off the bike but with a limited power supply, we had to design the Heated Layer to work with a 7.4 volt battery. We had to balance heat and time and weight. The greater the voltage, the greater the weight of the battery for the amps you need because as you increase voltage you increase the need for more amps. More amps, again, more weight. Then to get good heat with a battery that you can carry, you need to focus the heat. But then if you try to use more voltage, such as a car or motorcycle or a power supply off the main power, you get too much heat. We have solved that problem with our new Heated Layer Heat-troller. With this new controller, you can run the Heated Layer from 6.8 volts to 18 volts.
Choice 1: If the Heated Layer is only for use at this time with a 12Volt to 18Volt power source, just select the Heated Layer Size and that is it. This Heated Layer comes with the Multi-Voltage Kit including the New Heated Layer Heat-troller designed for Multi-Voltage, the 12Volt battery harness and the 12Volt Adapter Cable. SKU 27760121
if you want to power it off the car power port then order http://www.warmnsafe.com/cig-bmw-plug-to-coax-jack-18in-adapter-cable/
if you want to power it off the BMW Stype power port then order http://www.warmnsafe.com/bmw-plug-to-coax-jack-18-inch-adapter-cable/
Choice 2: If you want you can also use this Heated Layer with our 7.4Volt battery. Just select the battery you want. NOTE: these batteries do not have built in controllers because you already have the Multi-Voltage Controller in the Base Layer. Depending on your selection, you get one of the following.
7.4V 5.2A Battery, Belt Pouch, Ext Cable & Euro Plug Charger 27760107
7.4V 5.2A Battery, Belt Pouch, Ext Cable & World Plugs Charger 27760108
7.4V 7.8A Battery, Ext Cable & World Plugs Charger 27760109
Extra chargers, including a car charger are on: http://www.warmnsafe.com/office-home-use/
If you want extra batteries for this Base Layer, then go to: For another 7.4V 5.4A Battery http://www.warmnsafe.com/battery-7-4-volt-5-4-amp-without-controller/
For another 7.4V 7.8A Battery http://www.warmnsafe.com/battery-7-4-volt-7-8-amp/
if this is too complicated, let me know
The Heated Layer has 10 areas of heat. The chest, side of the chest, upper arms, neck, hands and lower back.
With our New Heated Layer Heat-troller, it can take power from our 7.4volt battery or a 12volt source, from 6.8 volts to 18 volts with only a designed increase in watts.