Smartphones have now been on the market for over ten years. With that said, we are now more hungry than ever for some extra juice in our smartphones. While battery capacities have increased, so have charging speeds.
Let’s back up a little though and answer the basic question, “what is fast charging?”
Fast Charging refers to devices and chargers capable of charging faster than the current 5 watts charging standard.
Batteries charge when a current passes through them. Apply a greater current and higher voltage charge and the battery charges faster. The charge controller (IC) protects against dangerous spikes in the current so that it doesn’t get near the upper limit and explode.
Here’s a rundown of the fast charging standards on the market today.
USB Power Delivery
USB Power Deliver (USB-PD) was developed by USB Implementors Forum (USB-IF). Any manufacturer manufacturing a device with a USB port can use this standard. It’s capable of a maximum output of 100W. USB-PD is primarily suited for laptops with USB-C ports.
Another benefit of USB-PD is that the direction of the power is not fixed. This means that a portable battery pack can both charge a device and be charged itself.
Last, but not the least, USB-PD provides only the necessary power that the device needs. A USB-PD charger can, therefore, for example, charge both a smartphone and laptop at their top speeds.
Just a moment before we dive in deeper: Are you in the market for a fast-charger with a USB-PD port? We at AMX have got you covered with the AMX-XP-60 Smart USB Charger.
Qualcomm Quick Charge
Qualcomm has been leading the charge with their Quick Charge (QC) technology. QC is an optional feature of the company’s system-on-chip technology. Since it isn’t tied to any of their Snapdragon processors, any smartphone manufacturer can license the technology and use it.
It started with QC 1.0 with a maximum power of 10W and has proceeded to QC 4.0+ that has a maximum power of 27W (using the USB-PD) and 100W via QC.
Qualcomm has also introduced Negotiation for Optimum Voltage (INOV). This ensures better temperature regulation and protests against overheating and overcharging.
Samsung Adaptive Fast Charging
Adaptive Fast Charging has been available on Samsung smartphones since the Galaxy S6, S6+ and S6 Edge were released back in April 2015. This technology is fully compatible with Exynos, Samsung’s own processor that powers over 90% of its smartphones.
Samsung’s Adaptive Fast Charging standard has a peak of 18W. Most Samsung devices support Quick Charge-compatible accessories.
For the Galaxy Note 10 Plus (and also Galaxy S20 Ultra), Samsung switched to the USB Power Delivery's Programmable Power Supply (PPS) spec to allow for 45W charging.
VOOC (Voltage Open Multi-Step Constant-Current Charging) is a charging standard exclusively available for Oppo’s range of smartphones. It can charge devices up to 50W.
Dash and Warp Charge
OnePlus’ fast charge technology used to be called Dash Charge but has since been rebranded to Warp Charge. The proprietary Warp Charging standard allows OnePlus devices to be charged up to 30W. This standard doesn’t increase the voltage like other standards. Instead, it allows for full-speed 30W charging.
The one difference between VOOC/Warp Charge and Quick Charge is that the former delivers higher amperages while the latter uses higher voltages.
Other fast-charge technologies
Here are some of the other fast charging technologies on the market:
- Huawei SuperCharge 2.0 (compatible with USB-PD)
- MediaTek Pump Express 2.0+ (compatible with QC 2.0)
- Motorola TurboPower (compatible with USB-PD)
- Apple Fast Charging (compatible with USB-PD)