I think my Crusher Wireless is trying to kill itself

So I’ve had these for a year and 4 months now and recently these last few days my crushers haven’t been holding a charge. I wear these all the time and take them everywhere with me and the only time I don’t wear them is when I’m near water or at school. I’m really clumsy and I always drop these so I don’t know if that could be part of my issue but I also use the same charging brick to charge my phone and headphones. I’ve noticed that when I unplug my phone from the charger the green light on the back of the crushers turns off and seconds later it turns back on. I don’t know if the box isn’t able to supply enough power to charge both but it used to be able to. These are the Gen 1s so I don’t know if the battery is dying just because the pair I own is outdated or not. Should I just buy a new battery for them or what does anyone recommend I do