The old "power bricks" that supply the 1541-II floppy disk drives with power lose their reliability over time and can then damage the drive through overvoltage. There are definitely newer power supplies to buy or you can build one yourself. However, with the increasing spread of USB-PD power supplies, which can supply different voltages and high currents, it may make more sense to use one of these to power the 1541-II. The 1541-II PowerAdapter makes just that possible.