I don't know why that, a common design, can't be done. Car batteries, watch batteries, and flashlight batteries all have a common design, shape and fit.
It's not for the government to do, it has to come from the battery manufacturers themselves. This will only happen when consumers push for this.
Imagine having to buy a Sony charger for your player, and another different charger for your cell phone and yet another different charger for your bluetooth devices.
Standardizing batteries will make reduce the cost of them.
Richard