content: I have nothing but trouble with the battery company that sent the power pack 600HD. I have never been able to charge it because of a defective charger. They cannot send me a replacement because they do not have one. They want me to pay full postage to send back the defective charger. They offered me a choice of replacement or junk and refund. I chose junk and refund since it is impossible to send such a heavy thing back at my cost. I bought this in August and have not received a refund, am being charged with interest, and have a $325 item I cannot use. When I called "Mark" he told me I was unreasonable to talk to and to call back when I calmed down. HELP. I only want to charge what I think would be a good battery to take camping or stop charging me and calling me unreasonable.