this the second replacement battery pack I have purchase . what set this one apart be the price . most place want $ 40 , or more , for this battery pack . I still feel that a $ 10 to $ 15 price range would be fair . but , pay half price do make I feel better . beware beware beware I do not use the flashlight everyday , so when I try it for the second time , just past the thirty day return period , I find that it be defective . guess what nobody would warranty it !