Depends on what you consider improvement. Back in '59 the battery was running the radio and that was pretty much it. Now it seems as soon as you turn on the key, the vehicle's computer has to monitor absolutely everything even though you just want to listen to the radio. The computerization of vehicles has improved them greatly but we are getting a lot more battery drain as soon as we turn the key on. I do like that it is smart enough to tell you that the battery has had enough and you better start the engine before it leaves you stranded.
You should be getting more than 2 minutes though. I can run the stereo, charge a phone and a tablet and get about 30 minutes. I figure that is because mine is a factory battery that is now over 3 years old. They are expensive but I plan on replacing it with an AGM battery which is designed to power accessories.