All the questions you need can be found here

Q1. What is universal input range?

“Universal input means the power source input range is within AC 90 ~ 240 Volt (±5%) and capable of operating at 50 and 60 Hz. These power supplies can be used anywhere in the world without adjusting a select switch for the input power.

Sunshine’s power supplies are designed to accommodate a wide range of ac sources while supplying the same output. Sunshine’s power suppliers can accept input voltages of between 90 and 264 volts. This makes it easy for customers to use the equipment directly on the ac mains regardless of whether it is low volts, or high volts range.”

Q2. How to choose AC plug?

“AC plug designs differ across countries, some for ref. as below:
British plugs: Three conducting pins
United States: Two-blade (flat pin)
Australian plugs: Two-blade pins, like””八””
European plugs: Two cylindrical pins, pins OD: 4.0mm
Korean plugs: Two cylindrical pins, pins OD: 4.8mm
Japanese plugs: The same as US plug, Two-blade (flat pin)”

Q3. How do I know what DC connector size I need?

If you are measuring you need the diameter of the center pin for the (ID) and the inner diameter of the port (OD). ID an OD measurements for both the female and male connector must match to connect properly.

Q4. Can I Use a Power Supply Unit with Lower Amps?

“The quantity of electricity present in a current is measured in amperes, or amps (A), while the number of amps used at any one time is called the amperage. The device to which your adapter is attached will pull in varying amounts of power in response to your activities. The strength of a current is measured in Volts.

When using an AC/DC adapter or charger, choose one that can supply at least the amount required by the device. For example, if the device needs 4.5A to operate, a 6A charger will supply this comfortably, running cool and charging efficiently. However, an adapter designed for only 4A may overheat and become unsafe if exposed to a 4.5A charge.”

Q5. What is a 12V DC Power Supply?

A 12V DC power supply is an adapter designed to supply precisely 12 Volts of direct current to a device. The voltage supplied must precisely match the requirements of the equipment.

Q6. Can I Use a 5V 2A Charger with a 5V 1A Device?

Yes. AC adapters are downwards compatible concerning amperage. A 5-Volt 2-amp charge will run smoothly with a 5-Volt 1-amp device.

Q7. Can I use 12V adapter for a 15V device?

Assuming the polarity is correct, plugging in a 12V input to a device requiring 15V won’t do any damage, but the 15V device won’t work, however if you undervolt an amplifier, you may get clipping or other distortion.

Q8.Can I use 3V USB charger instead of 5V?

There is not such thing (or there should be no such thing) as a 3V USB anything… USB is 5V, and always will be. It is a standard that all devices must comply with. This means that you should not be able to find an AC adaptor to 3V with USB, If you do find it, don’t buy it.

Q9. Is an AC Adapter the Same as a DC Adapter?

These two terms are often used synonymously, but strictly speaking, they refer to two distinct devices. An AC adapter converts alternating current from one voltage to another, while a DC adapter converts alternating current into direct current. Since the latter is more widely used, the term AC adapter is often used to refer to DC adapters.

Q10.How many watts is fast charging?

As a general rule, a charger needs to be at least 18W from a single port to deliver fast charging.

Q11. What is the PD function?

Power Delivery (PD) is a specification for handling higher power and allows a range of devices to charge quickly over a USB connection. It operates by facilitating a conversation between two devices to negotiate a power contract so they can determine how much power can be pulled from the charger. Power Delivery starts at the 5V setting and is configurable up to 20V. Using a standard USB-C cable, it can handle up to 60W, and will go up to 100W using a designated EMCA cable.

Q12.What is a QC 3.0 charger? What does QC 4.0 mean?

Qualcomm Quick Charge 3.0. Provides optimized charging to any compatible phone or tablet, charging a phone up to 80% in 35 minutes—up to 4x faster than standard chargers. Unrivaled USB Efficiency. Qualcomm Quick Charge 3.0 is 38% more efficient than the previous version, Quick Charge 2.0.

Quick Charge 4 allows a device to be charged from empty to 50 percent in just 15 minutes while maintaining the plug-and-play ease of use of USB Type-C connectors. Quick Charge 4+ features all the benefits of Quick Charge 4 and more. In a device, this includes, Dual Charge, Battery Saver and charging thermals reduction.

Q13.Does iPhone use PD or QC?

“iPhone and iPad only support the PD fast charge protocol, but not other protocols such as Qualcomm’s QC, so we need to be clear that charging devices need to support the PD protocol.
Sunshine’s star products are 20W 25W 33W 45W 65W PD fast charger.”