OMFG, Dell, why can't you be normal and make your batteries die like any other batteries - by simply switching the laptop off immediately when the charger is unplugged???

Guess what it looks like when a JD25G (XPS13 9530) battery is dying (still 88% health)!

Constant screen flickering (yes, even in BIOS). Good thing I'm not an epileptic - my screen is fucking strobing!!!

I know it's a battery, because I had the same issue some years ago when I replaced the died original one with a cheapo made by GreenCell. Boi that was fun - I saw my laptop do miraculous things I never would've thought of! Screen flickering was one of them. As soon as I replaced that turd with an original one all these magic powers went away.