A few weeks ago my battery was dead and when I charged it up my camera said can't communicate with battery, so I bought a new one and it worked flawlessly till this weekend and the same thing happened, dead and no communication. I charged up both batteries and spent the day taking photos and everything good till I pressed the shutter and nothing. I checked and the camera said it can't communicate with my lens. I shut the camera off and turned it on and no problems except it still won't talk to the battery. I cleaned all the contacts, does this sound like something is shorting out or what. It seems like there is a drain on the battery, after full charge and sitting in the camera overnight and only 19 photos the battery was down 25 percent. Any Ideas. Terry.