The charger on the wall is commonly referred to as a wall charger or USB wall charger. It may also be called a power adapter or charging adapter.
To choose a wall charger, consider the following factors:
Wattage: Match or exceed the wattage recommended for your device. Check your device's manual or specifications for the required wattage.
Charging ports: Determine how many devices you need to charge simultaneously and choose a charger with enough ports.
Charging standards: If your device supports fast charging (e.g., Quick Charge, Power Delivery), select a charger that is compatible with those standards.
Safety: Look for chargers with safety certifications like UL certification to ensure safe operation.
The amperage (A) rating of a wall charger should match or exceed the amperage required by your device. For most smartphones, a charger with 1-2 amps is common. Tablets or other devices might require higher amperage chargers, such as 2.4 amps or more.
The wattage of a wall charger is the product of its voltage (volts) and current (amps) output. For example, a charger with a 5V 2A output has a wattage of 10 watts (5V x 2A = 10W). The wattage you need depends on your device's charging requirements. Match or exceed the recommended wattage for your device.
A USB wall charger is essentially the same as a wall charger. USB chargers plug into a wall outlet, so there's no difference in charging speed between the two. The charging speed primarily depends on the charger's wattage and the charging capabilities of your device. For faster charging, use a higher-wattage charger if your device supports it. Additionally, some devices may support faster charging through specific charging standards (e.g., Quick Charge, Power Delivery), so using a compatible charger with those standards can also speed up the charging process.