I purchased this light off walmart.com and it is the second generation with no hi/low switch on the back. Because the larger size and weight it is kind of awkward hauling it places and shining it around. Besides the size and weight issue I am currently getting around 25 minutes of battery life on a single charge which I have read is great for this amount of flashlight power. When I start it with a full charge I only get the green light for a second then it turns orange then red (seems to be common). I am still running cycles through it to see if the battery life and green light issue improves. Other than that I think it is a great flashlight with high lumen output and high through compared to my other lights. By using this light a few times all my other lights don't seem bright anymore even though they are all above 100 lumens.