Samsung provides battery cells with the best capacity and performance and the best quality and performance battery packs whose design and production have been thoroughly validated.
The Low setting is closest to normal body heat at 86°F and will give you a run time of 8 hrs. The Medium setting at 104°F is what most people would find warm and gives a run time of 5 hrs. The High setting comes in at a toasty 122°F that feels like your hands are next to a campfire and will run for 3 hrs