Between prepping for a recent tournament and participating in it, the temperature never rose above 5 degrees. Keeping warm without weighing myself down was key to staying mobile while staying somewhat warm. Every pound saved counts when you don't have an ATV or snowmobile and you pull a sled everywhere. Having the Dakota Lithium Outdoors battery saves me precious pounds and allows me to move faster and more efficiently from place to place. You may not think a battery would be so much of a weight savings, but trust me, every pound you don't have to pull around in a sled when there's snow on the ice is beneficial, especially when it's well below zero. This battery is well worth it for both its savings on weight as well as its longevity, which is going on 37 hours with no charge and still going strong.