title_body: What is a safe amount of time a LiPo pack can be kept fully charged before it is discharged to storage capacity? Is there any research that shows the actual decrease in capacity/performance/longevity of high discharge current LiPo batteries, like those used in quadcopters, depending on the total time they spent being fully charged? Maybe there are some chemical processes that start to occur after some time of being charged which should be avoided and the time until they start being harmful can be measured or calculated...
  
  What rule of thumb (that can be scientifically backed, or would at least be an educated guess) can we assume to keep the batteries in good shape without being too extreme?
upvoted_answer: You should store the battery fully charged as little as possible; a few days is probably fine, but when it gets closer to a week or more you might start to see it's health degrading. That said, there is no hard limit where it will stop working, so my advice is to charge it when you are going to use it, and then charge / discharge it to 3.8 V / cell when you are done.
  
  
    A battery sitting at room temperature fully charged will lose about 20% of its capacity in a year. A battery sitting at 60 degrees Celsius will lose 40% of its capacity in just 3 months.
  
  
  https://brushlesswhoop.com/storing-fully-charged-lipo-batteries/