Most people have cell phones and smartphones. The battle has been to increase the functionality and features of smartphones (which require more power demand), while increasing the life of the battery (and at the same time making the batteries and phones smaller). Because modern smartphones put a high demand on their batteries, many people use a car charger plugged into their cigarette lighter to charge their phone while they are on the go. Recently, people have begun to wonder, if their car charger could be damaging their cell phone battery.
Two things are necessary to achieve a proper battery charge:
A steady stream of charging voltage with a current limiter or regulator
An indicator to verify, when the battery is fully charged
Cars are notorious for providing unsteady voltage that is prone to spikes. The biggest spikes in voltage occur, when the car is started. These spikes in voltage have the possibility of damaging your cell phones battery. There are car chargers available that come with quality voltage regulators. These voltage regulating chargers will certainly help maintain a steadier stream of voltage into your cell phone’s battery. The best practice is to not have your cell phone plugged into the car charger, when starting the car.
Many people will leave their cell phone plugged into a car charger, even when the phone is fully charged. Rechargeable batteries are meant to be charged, used, and recharged. Running your cell phone on full charge, while it is plugged in, can lessen the life of your battery. When the smartphone says it is fully charged, best practice says to not plug it in, but to use the battery power before charging.
If you misuse your cell phone car charger by plugging in the phone during car starting or when the phone is fully charged, then you could run the risk of damaging your cell phone battery.