1/3 pound balls aren’t heavy enough, even for a beginner, for hanging sessions. This is because hanging sessions tend to be shorter in nature (10-30 minute sets are typical). It’s pretty unlikely that 1/3 pound balls worn for 10-30 minutes at a time will be sufficient. They are probably only sufficient for a very light ADS.
In truth, most ADS systems use more weight than that even. The JES extender, for instance, provides up to 1500g of tension (which is about 3.3 lbs). The recommended time of wearing the device for the quickest results is 12 hours a day. That is definitely a more aggressive ADS than what you’re referring to. Assuming there is a correlation between weight and time, let’s say it’s linear for fun (even though I doubt that), you would have to wear your 1/3 pound weight far longer (months/years more) than a JES at 1500g and 12 hours a day to achieve the same results.
I hope this information helps you see this logic:
1/3 pound balls < JES
JES < Hanging
1/3 pound balls < JES < Hanging
1/3 pound balls < Hanging (less than and not even close to equal)