Start with the real requirement
Heat is one of the biggest causes of battery stress. Avoid leaving a phone in direct sun, inside a hot car or under heavy bedding while charging.
Check the practical details
Use a suitable charger and replace damaged cables. Unstable connections can interrupt charging and create unnecessary heat.
Make a confident next step
Reduce background activity you do not need, lower screen brightness when practical and review battery usage to identify unusually demanding apps.
This article provides general information. Confirm product specifications, safety guidance or service terms for your exact situation.