Use Universal Charger?

Many people like to use the "universal charger" and think that universal charger is cheap and convenient. However, this kind of charger is not produced by the original factory, its charging current is not suitable for all battery models, and the quality of the charger itself is poor, causing many explosions.
Put it in the sun to "warm" the phone
Many old models of mobile phones show lower battery power in winter than in other seasons. This is because the cold reduces the chemical reaction activity in the battery. Therefore, many people like to put the mobile phone in the sun, or put it next to the heater to "warm". This practice is also wrong. Once the battery overheats, it will easily lead to explosion.