I have a USB lighter. No flame but it sure does hold a charge for a while.
I just posted my initial thoughts on the arc lighter here in case anyone is interested:https://forum.multitool.org/index.php/topic,80272.0.htmlDef
I was outside for about an hour when the rain started to seep through my rain gear. I was completely soaked inside and out by the time we were done. Even my awesome waterproof winter boots, rated to -40C were no match for the water and cold today. Unfortunately my boot dryer is in Ottawa, so they will be wet for days now. Def