Equally common is to simply plug any USB cable into your laptop and let it charge your phone. It is very common to buy wall chargers that allow you to plug a USB cable into it to charge your phone. USB charging is not immune to issues too. However where your phone requires 700mA and your charger only supplies 500mA is when many issues can occur ranging from very slow charges, to overheating, to complete device failure. If the phone requires 700mA to charge and you happen to use a charger with a 1A output, the phone will draw only up to the 700mA – no problem here. If the charger is only rated to output 3.0v then that will not charge a 4.2v battery.įinally, we need to look at the Output amperage – This indicates the maximum amount of current available from the charger for the phone to pull what it needs. Most cell phone batteries fully charge to around 4.2volts and so the charger output must be greater than 4.2. Next, you need to look for the Output voltage. However, take a charger from the USA that is rated only at 110v and stick it in a wall socket in South Africa at 220v and you will trip the circuit breaker and bye-bye charger. Usually something like Input: 100-240v~ This means that if you live in a country where the normal household voltage is between 100 and 240 volts and you put this charger in the wall it won’t blow up. If you look on the charger itself you will see a tiny label that contains the input levels. The wall-charger is built to take the normal current and bring it down to a level that your phone needs. It is critical that your charger understands these stages and is able to adapt accordingly. 4: Standby mode where only a top-up charge is supplied when the battery drops below a specified voltage.3: When the battery is fully charged and the charger cuts the current off from the cell phone completely.2: The voltage peaks and current from the charger begins to decrease.1: as you connect your phone the battery’s voltage quickly increases.There are 4 stages that occur when you charge your phone: Therefore, just because the connector fits, it doesn’t mean that you should use any charger. In other words, the connectors are the same size but the chargers themselves are not the same. However, whilst the physical design of the microUSB was adopted the circuit paths inside the chargers are not universal. The thinking behind this move was that since you can make use of any charger, you will not throw your old charger away therefore reduce e-waste which is a win for the environment. The root of this issue is in the attempted standardization by manufacturers to adopt the microUSB charger design as the charging port. However, what you might not know is that not only could you be damaging your phone but you could be doing such serious damage that it voids the phone’s warranty! We assume, since it fits, it must be fine. Since most phones, these days have the same MicroUSB or USB Type C or Lightning connector, any charger seems to fit.
If you are having any battery issues with your phone ask yourself: Are you using the charger that the phone’s manufacturer supplied in the box? Have you bought an aftermarket charger? Are you using the charger from another manufacturer to charge your phone even though it is not the same company? Did you buy one of those car chargers at the traffic light?
Something you hear often these days: “my phone’s battery isn’t lasting as long as it used to” or “I charged it all night and it is already dead” or “my phone charger keeps hanging and I have to take out the battery.”
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