Heat, Pressure, Manufacturing Defect, Using The Wrong Charger Or Charging Volume.
cut it
If the battery is defective there's no way to fix the battery must just replace the battery.
How you fix a tail ligth from killing battery
While a swollen battery in an iPhone 5 is a sign of damage, it is not guaranteed to explode. However, continuing to use the device with a swollen battery poses risks, including potential leakage, overheating, or even fire. It's strongly advised to stop using the device and have the battery replaced by a professional to ensure safety.
recharge it or get a new battery
Get a new battery.
You either have a weak battery that needs replacement or you alternator is defective. Start the engine and check the voltage at the battery with a volt meter. It should read from 13.5-16 volts. Anything less and the alternator needs replacing. If it is reading within that range the battery is defective. Another possibility is a defective battery cable that is swollen or frayed.
swish warm salt water in your mouth and brush your gums. :]
No, there is not. The internal battery is an actual battery that has ran out of energy. No button sequence will do anything about it. You will need to replace it to fix it.
Don't fix it...replace it.
Usually from being discharged in below freezing weather. The water will freeze in a dead battery, expand, & swell the battery. This won't occur with a fully charged battery.
Get a new battery its probably your battery.