I read all the reviews AFTER I order three of these and none of them worked. Wish I had read them before. I appreciate that some of you can MAKE them work by soldering, etc., but I purchased them for my 85 year old Dad for a Christmas present and the item should work out of the box. No clear direction on which way batteries should go or which way battery pack should go back into flashlight. I tried every possibility I could find and nothing worked. I have never had occasion to return an item from Amazon, but all three of these didn't work and are being returned the day after Christmas. Such a disappointment.