Software problem related to charging

I have a wired problem that I assume caused be a software problem. My airdots was working fine but 3 months ago this happened. When i am using both airdots it takes about 10 minutes then die. I try to open them again but then died again after a minute(Note: the phone shows that the airdots is 10%) so it is detected as if it is out of power. But after dieing if i turned on any dot and used it solely it works fine and lasts for the normal time.