- Joined Jan 2, 2023
Blair - 18650's are typ. 3.7VDC. Sounds like your pack has two in series = 7.3VDC. If you can reorient those in parallel, you'd have something maybe closer to the correct voltage & therefor wattage , but twice the capacity runtime.Hi all
I bought a couple of 7.4 VDC batteries and I would like to run them with my Therm-ic brand insole footpads. The footpads are about 12 ohms of resistance each. The 7.3 volt batteries run the footpads too hot when hooked up directly. I am trying to figure out an easy way to lower the 7.3 volt batteries to put out somewhere between 5 and 6 volts. The insoles are a constant resistance at 12 ohms each. Is there an easy way I can accomplish this? Whatever it is, it needs to be very compact as it will hang on the back of a ski boot. A resistor, an LED? Ideas?
The batteries are Tenergy Li-ion 18650 at 7.4 volts, 2600 mAh and are rated at a max discharge current of 5.9 A and a continuous discharge current of less than 2.6 A
I dont mind if I loose a little efficiency as these batteries have plenty of power
Edit by moderator: The original thread is: (1) DIY ski boot heaters | All About Circuits
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