I've consistently replaced the battery in my 2005 Dodge Grand Caravan every two years. I drive short distances, mostly, in town. After sitting for about ten minutes with a door open or the radio running, it would need to be jumped. I was leaving for Colorado so I replaced it (Napa Legend 75). The factory battery failed at about two years. It was replaced with a Napa battery, followed by another, and now the 4th battery. I have tried to charge the battery periodically. The Ford dealership where I work did not have a Motorcraft in stock and I had about $40 pro-ration left on the current battery so I went with a Napa. I attribute the short battery life to the short distance driving, and the fact that my daughter ran the battery down a couple of times listening to the radio. My plan is to put a battery tender on it and keep it charged at least once a week. Any suggestions as to brands? I'm hoping to find one that I can leave the wires attached to the battery and just plug it into the tender periodically. Thanks in advance.