What is reverse charging?
Reverse charging is a mechanism in which the liability to pay VAT (Value Added Tax) is shifted from the supplier to the customer. In a normal transaction, the supplier is responsible for charging and remitting VAT to the government. However, in a reverse charge transaction, the customer is responsible for paying the VAT to the government. This mechanism is typically used in industries where there is a high risk of tax evasion or where the supplier is not registered for VAT.
What is reverse charging in mobile phones?
Reverse charging in mobile phones refers to the ability of
a mobile phone to act as a power source for another device, such as another
mobile phone or a portable speaker, by allowing the other device to charge its
battery using the charging port of the first phone. This feature is also known
as "reverse charging" or "OTG charging." It is enabled by a
technology called USB On-The-Go (OTG), which allows a mobile phone to act as a
host device and supply power to other USB devices. Not all mobile phones have
this feature, but some newer models do.
How does reverse charging work in mobile phones
Reverse charging in mobile phones works by utilizing the USB
On-The-Go (OTG) technology. USB OTG is a feature that allows a mobile phone to
act as a host device and supply power to other USB devices. The phone that is
being used to charge another device is referred to as the "power
source" phone, while the device that is being charged is referred to as
the "client" device.
To use reverse charging, the power source phone must have a USB OTG cable connected to it. The client device is then connected to the other end of the cable, and the charging process begins. The power source phone's battery is used to charge the client's device. The charging process can be monitored on the power source phone, typically on the notification bar. The charging speed may vary depending on the battery capacity of the power source phone and the client device.
It's worth noting that not all mobile phones have this feature, and reverse charging may not work with all devices that support USB charging. It's always recommended to check the phone's manual or specifications before trying to use this feature.
What is reverse wireless charging?
Reverse wireless charging, also known as "reverse wireless charging," is a technology that allows a device, such as a smartphone, to charge other devices wirelessly. This is done by using the charging coils in the device to create a magnetic field and transfer power to the other device. The device that is being charged is referred to as the "receiver" device, while the device that is providing the charge is referred to as the "transmitter" device.
To use reverse wireless charging, both the transmitter and receiver devices must support the technology and be placed in close proximity to each other. The receiver device can then be charged by placing it on top of the transmitter device. The charging speed may vary depending on the battery capacity of the transmitter device and the receiver device.
It's worth noting that not all mobile phones have this feature, and reverse wireless charging may not work with all devices that support wireless charging. It's always recommended to check the phone's manual or specifications before trying to use this feature.
Advantages of reverse charging in mobile phones
There are several advantages to using reverse charging in mobile phones:
1. Convenience: Reverse charging allows you to charge other devices using your mobile phone, eliminating the need to carry multiple charging cables or power banks.
2. Emergency Charging: In case of emergency, you can use your mobile phone to charge other devices, such as a friend's phone, when they have run out of battery.
3. Cost Savings: With reverse charging, you only need to carry one charging cable, which can save you money on buying multiple cables.
4. Increased battery life: By using reverse charging, you can save your power bank's battery life, as you can charge other devices using your phone's battery.
5. Compactness: With reverse charging you don't need to carry multiple charging devices, which makes it more compact and easier to carry around.
6. Wireless charging: Reverse wireless charging eliminates the need for cables, making charging even more convenient, and also improves the charging speed.
It's worth noting that not all mobile phones have the reverse charging feature, so it's always recommended to check the phone's manual or specifications before trying to use this feature.
Disadvantages of reverse charging in mobile phones
While reverse charging in mobile phones has many benefits, there are also some disadvantages to consider:
1. Reduced battery life: Using reverse charging can drain the battery of your mobile phone more quickly, especially if you are using it to charge multiple devices or charging devices with larger batteries.
2. Limited compatibility: Not all devices are compatible with reverse charging, so you may not be able to use it with all of your devices.
3. Slow charging: Reverse charging typically charges devices at a slower rate than a traditional wall charger or power bank.
4. Limited power: The amount of power that can be transferred to other devices may be limited by the battery capacity of the mobile phone.
5. Safety concern: There is a risk of overheating or short circuits when using reverse charging, especially if you are using it with devices that are not designed to be charged in this way.
6. Limited Wireless Charging: Reverse wireless charging may not work as efficiently as traditional wireless charging methods and may have limited range and compatibility issues.
It's always recommended to check the phone's manual or specifications before trying to use the reverse charging feature, and to use it with caution, to avoid any safety issues.
How fast is reverse wireless charging?
The speed of reverse wireless charging can vary depending on several factors, including the transmitter device's battery capacity and the receiver device's battery capacity. Additionally, the charging speed may be influenced by the charging coils and technology used in the devices.
In general, reverse wireless charging is slower than traditional wired charging methods, such as charging with a wall charger or power bank. Some devices that support reverse wireless charging may charge at a rate of around 5W to 10W, which is slower than the typical charging speeds of 15W to 18W with traditional wireless charging methods.
It's worth noting that the charging speed can also vary depending on the devices being used, and it's always recommended to check the device manual or specifications to confirm the charging speed. Additionally, the charging speed may slow down as the battery gets close to full capacity, as a safety measure to prevent overcharging.
Which phones can be charged by reverse wireless charging?
Reverse wireless charging is a feature that is not available on all mobile phones, and the list of devices that support this feature may change over time as new models are released. Some of the mobile phones that currently support reverse wireless charging include:
Samsung Galaxy S21, S20, S10, S9, Note 20, Note 10
Huawei P40 Pro, P30 Pro, Mate 30 Pro
OnePlus 8 Pro
Xiaomi Mi 10 Pro, Mi 9
Google Pixel 4, 4 XL
LG V60 ThinQ
OPPO Find X2 Pro
It's worth noting that this is not an exhaustive list, as
new devices with this feature may be released in the future, and also some
phones may not have this feature even though they have wireless charging
capabilities. To confirm whether a specific device supports reverse wireless
charging, it's recommended to check the device's manual or specifications.
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