I was very pleased with the response I received from Martin on the battery box on my DCPA4 I noticed the whole thing was loose , upon taking it apart the whole bottom fell apart the plastic housing was broke ? how I don't know but I sent an e-mail and gave them my address so they could check it out that I had a guitar purchase that was under warranty . I told them I was not interested in sending the whole guitar back nor was I inclined to travel 100 miles round trip to have an authorized repair . I got an e-mail back saying they had shipped the part to my address. I have it semi repaired now but the plug in is not usable , I can still play it and tune it but no amplification. When the new part arrives I will be very careful how I install it .