Is the current rating total or per channel?

The current is the total output up to 2.1amp. If two devices are charged at the same time, the total current will be split evenly between each port. If only a single device is charged, the maximum output current is 2.1amp, thank you!

I bought these recently and they carge my device, but they emit a high pitched noise. Is this a safety issue?

Yes! I just received mine yesterday and same thing. Reminds me of high pitched tones used when testing hearing of high pitched tones. Maybe too high pitched for some people to hear. Unsure if safety issue but it is annoying

I have item that powers from wall 110. i need to power it from a usb port. i need the reverse of this converter. send me link?

Unfortunately, you won't be able to power a 110V device from a USB port. USB simply cannot deliver that kind of power, converter or not. If you need to run a plug-in device in a car that has 12V jacks ("cigarette lighter" ports), you can use a device called an inverter to do so. Search "car inverter" here on Amazon and you'll find lots of them. Look at the power requirement of your device (i.e. how many watts it uses) to determine what size inverter you will need. Good luck!

I need a usb to power an himalayan salt lamp. would these work?

This is 2.1A. Compare that number and make sure it is above the amperage of the lamp

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USB Charger Block, 4Pack 2.1A Dual Port USB Wall Charger Plug Power Adapter | Charging Blocks Cube Box Brick, for iPhone 14 13 12 11 Pro Max SE XS XR X 8 7 6 Plus, Galaxy, LG, Pixel, Android Phones

Product ID: 57930274

Details

Amperage
2.1 Amps
Brand
X-EDITION
Color
White
Compatible Phone Models
Motorola Moto
Connector Type
USB Type A
Included Components
4-Pack Dual

⚡2.1A max output

🌍AC100-240V universal input

🔌Dual USB ports

S$23

Duties & taxes included

In stock

Sold byAmazon SINGAPOREDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔋 Charge smarter, not harder — power your life with X-EDITION!

SMART CHARGING TECH - Built-in IC chip intelligently delivers optimal current to protect and speed up your device charging.
SAFETY FIRST ALWAYS - Fireproof PC casing with multi-layer protection guards against short circuits, overheating, and over-voltage.
POWER UP TWICE AS FAST - Dual USB ports let you charge two devices simultaneously without compromise.
UNIVERSAL COMPATIBILITY - Works seamlessly with iPhone 16e to 4S, Samsung Galaxy, Google Pixel, and more—one charger for all your essentials.
TRAVEL READY COMPACT DESIGN - Lightweight cube with heat-resistant, anti-throw build fits perfectly in your bag or office desk.

The X-EDITION USB Wall Charger 4-Pack features dual 2.1A USB ports with universal AC100-240V input, compatible with a wide range of smartphones and USB devices. Its compact, heat-resistant design includes smart IC technology for optimized charging and multiple safety protections, making it ideal for home, office, and travel use.

Specifications

ASIN	B0794WT57Y
Additional Features	Dual Port Design, Travel, charging blocks, usb charger block, usb plug adapter for wall outlet
Amperage	2.1 Amps
Best Sellers Rank	#2,243 in Cell Phones & Accessories ( See Top 100 in Cell Phones & Accessories ) #220 in Cell Phone Wall Chargers
Brand	X-EDITION
Built-In Media	4-Pack Dual USB Charger Block
Color	White
Compatible Cellular Phone Models	Apple iPhone 16e
Compatible Devices	Compatible with iPhone 16e 16 15 14 13 12 11 Pro Max XS XR X 8 7 6 6S Plus SE 5S 5, Pad, Samsung Galaxy S25 S24 S23 S22 S21 S20 S10 S9 S8 S7 S6 Plus, Note 20 10 9, A56 A55 A54 A53 A52 A73 A72 A71 A70, Google Pixel 9 8 7 6 Pro 5 5a 4 4XL, LG, Moto, Tablets, Android Phones, Small Fan, Small Speaker, Electric Toothbrush, Bluetooth Speaker, E-book Readers, Electric shaver, and more USB devices
Compatible Phone Models	Motorola Moto Z
Compatible Power Plug Type	Type A - 2 pin (North American)
Connectivity Technology	USB
Connector Type	USB Type A
Current	AC
Current Rating	2.1 Amps
Customer Package Type	Flat Free Package (FFP)
Customer Reviews	4.7 4.7 out of 5 stars (27,888)
Enclosure Material	Durable Plastic or Lightweight Metal
Input Voltage	240 Volts
Item Weight	2.88 ounces
Main Power Connector Type	2 Pin
Manufacturer	Shenzhen Zhonghui Electronics Co., Ltd
Mfr Part Number	XD US Chargers 4pcs white
Model Number	TE2152
Mounting Type	Wall Mount
Number of Items	4
Number of Power Levels	1
Output Current	2.1 Amps
Output Voltage	5 Volts
Portable	Yes
Power Plug	Type A - 2 pin (North American)
Power Source	Corded Electric
Specification Met	CE, Qi, UL
Total USB 2.0 Ports	2
Total Usb Ports	2
Unit Count	4.0 Count
Warranty Description	12-month
Wattage	10.5 watts
Wired Charging Connector Type	USB Type A

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