Cold Start Issues

I thought that the people on this forum were real Motor heads. But with some of the questions I've seen, it leads me to believe that is not always the case. With the knowledge some people have on this forum it really impresses me. I've been running Mopars since 65, from my 58 Fury, 68 Roadrunner, 71 340 Duster, 77 Cordoba, 83 Town & Country & my 05 Ram Rumble Bee. All of them great cars. Today I was let down by my 05 Ram that wouldn't crank because I hadn't used it in a week and the original battery, 14 years old, said were not going anywhere. If it wasn't pouring this A.M. I would have jumped it, but instead used my other car. I did forget to mention my 10 SRT and 71 Cuda with the Gen 2 Hemi. I'm am a convicted Motor head.