From smartphones to laptops and cables to chargers, manufacturers are talking about “Fast
Charging”, but what does it really mean? Fast Charging is a term frequently used to market
chargers and devices capable of charging faster than the current charging standard (5 Watts).
Though there are multiple technologies that enable these fast charging speeds, there is no
industry-standard language around them. In addition to this lack of conformity, you should be
aware that though many manufacturers claim their product delivers fast charging speeds, it may
only provide the standard 5W.
We have put together this guide to help you understand fast charging and find the fast charging
technology that is right for you.
To learn more about the two most common forms of fast charging, visit
The basic components of charging are amperage, voltage, and watts. Amperage (or current) is the
amount of electricity flowing from the battery to your phone or other connected device. Voltage is
the speed or strength of the current. Watts are amperage multiplied by voltage. A common comparison
used is a watering hose. Amperage (or current) is the hose width, voltage is the water pressure, and
watts is how much water is coming from the hose.
So, how does Fast Charging turn up
Charging happens in two phases. In the first phase, a higher voltage increases the charging rate.
Fast charging chargers leverage this phase to increase power flow. Once the battery has received
most of its charge, the charger will decrease voltage to preventing overheating or overcharging,
ensuring your smartphone and charger are both safe.
Exact speeds vary by device safety requirements.
How do you charge faster?
Before you embark on a high-speed charging journey, you’ll need the
right equipment. Your smartphone, tablet, laptop, or other device will all need to use the same fast
charging standard. In some cases, even your cable will need to be compatible with the fast charging
standard used in your device and charger.
Once you have a charger and cable with the fast charging standard
compatible with your phone, laptop, or other device, take note of the maximum charging speed for
both. For example, if you are using a 27W charger with a smartphone that has a maximum charging
speed of 18W, the phone will charge at 18W.
Types of Fast Charging Standards
The original and most popular types of fast charging standards are
USB Power Delivery (or USB-PD) and Qualcomm Quick Charge. In addition to these, you may be familiar
with TurboPower, Adaptive Fast Charging, or SuperCharge. Many of these are based on Qualcomm Quick
Charge and have been rebranded for marketing purposes. Similarly, Apple uses USB-PD standard in
their devices, so your iPhone will be compatible with all USB Power Delivery chargers and cables.
Fast Charging Standards
USB Power Delivery
Charge Up To
USB Implementers Forum
USB-A, Micro USB and USB-C
Older Samsung, LG, and other smartphones and tablets
iPhone 8 and later, Google Pixel, iPad Pro 10.5” and later, Samsung S10 5G, Samsung Note
10+, Samsung Note 20 devices and later, Samsung S20 devices and later, and other
Because these technologies allow your smartphone to charge faster
than standard charging speeds, your phone and charger may become warm while charging. To ensure
you’re always charging safely, use high quality chargers and cables that have all relevant
certifications. When using fully certified accessories, a fast charge is as safe as standard
closeIs fast charging
bad, or does it damage batteries?
To ensure safety and optimal speeds, always check that your fast charging accessories are
certified to be compatible with your smartphone. This is most likely going to be Quick
Charge or USB Power Delivery. Certified accessories ensure the charger or cable meets
performance and safety standards. With a charger or cable that’s not certified, there’s an
increased risk of shorting or overheating, which can damage both your device and charger.
Your charger may get warm while powering devices, but if it’s produced by a reputable
manufacturer and certified compatible, there’s nothing to worry about. These certifications
mean a series of safety measures have been taken. A controller chip regulates the flow of
electricity to your battery, ensuring there aren’t any dangerous spikes in the current while
temperature and voltage controls keep your charger running within safe parameters.
Before purchasing or using a fast charging accessory with your device, you should first
verify that the product you are using is:
Manufactured by a trusted brand
Qualcomm Quick Charge or USB Power Delivery certified
Includes technical specifications and warranty details that protect your device from
damage caused by the accessory
The original and most popular types of fast charging standards are USB Power Delivery and
Qualcomm Quick Charge, but you may have heard about Adaptive Fast Charging, TurboPower, and
SuperCharge. Most of these are based on Quick Charge or USB Power Delivery and have been
rebranded for marketing purposes.
To ensure a charger will fast charge your device, you can check with the manufacturer for
compatibility. As a general rule, a charger needs to be at least 18W from a single port to
deliver fast charging. You can also check for the USB Power Delivery and Quick Charge logos
closeHow fast do phones
charge with fast charging?
USB Power Delivery (iOS/iPhone and Android/Google Devices):
iPhone 8 or later will charge from zero to 50% in 30 minutes*
iPad Pro recharges from zero to 50% in 60 minutes*
Pixel 2, 2 XL, 3, and 3XL recharge from zero to 50% in 37 minutes*
Listed USB-PD devices and speeds reflect capabilities as of July
Qualcomm Quick Charge (Samsung, LG and other smartphone and tablet
Quick Charge 3.0-compatible devices charge from zero to 80% in 35 minutes*
Quick Charge 4.0-compatible devices charge from zero to 50% in 15 minutes*
Listed Quick Charge devices and speeds reflect capabilities as of
*Charge time varies with environmental factors; actual results will