The right charger for your battery is crucial to prevent overcharging; the charger must match the battery in terms of output voltage and Ah rating. It's easier to avoid overcharging in lithium-ion batteries because they can receive a partial charge or be charged intermittently.

How do I stop my phone from overcharging?

Try to plug in your charger before reaching 10% Unplug your charger around 80-90% Don't perform heavy tasks (like gaming, or editing) while charging.

What is the cause of overcharging?

They can be faulty because of a variety of reasons: incorrect wiring, or mislabeled charges are the most common causes. These faults will translate to an overcharged car battery easily, as the charger starts supplying either the wrong amount of electricity or using the wrong charges to do so.