I have, for almost a year now , a Thermotorch Elements by Celestron flashlight. I not only is a flashlight, it is a hand warmer and 5k mah charger. The light has 3 settings. low, medium and high. It charges USB devices and works well as a hand warmer. It has, for me,proven it's self in all 3 areas. I keep it in my truck and have used it and somewhat abused it and it is great. The reviews I have read are positive with a couple of negative reviews. I give it a 5 out of 5 stars. I find the light to be bright and does a great job of charging my phone and mp3 devices. It takes a few minutes to heat up but is very warm. It lasts a good time depending on how you use it. Hope you find this useful.