new laptop charger - uncrontrolable mouse!?
Sounds like the charger is either not the right charger or is faulty. I can't imagine why exactly it would cause that problem with your mouse, but it seems like something must be shorting, which is not good! Don't continue to use the charger at this point, get it replaced. Did you get it directly from the manufacturer? If so, it may be faulty. If not, you may have incorrect specs (not only the voltage).