Rapidly dying battery

I've had my peak for over a year but not a year and a half yet I dont think. Im at almost 4,000 dabs and it was working perfectly until I put in the 3dxl coil. Now it works until its about 60 percent, then it will go for half the dab session and blink red 3 times then shut off. I've seen the app say a super high temp once but i also noticed that it'll shut itself off, I turn it back on and check the app to see what percent its at and I'll watch it go from 20% back to 55-60% without being plugged in. Im very confused on what the problem could be, I clean it regularly, I dont pull too hard and I charge it only when it says its dead.