Will this effectively charge a portable car battery charger?

It all depends on what ratings on the car battery are. Once you have volts & amps then match with incoming volts & amps on electrical source. Good luck.

Is there a usb version? if the cable connected to the transformer via usb, it would be more helpful to me.

Sorry my friend that information can only come from the manufacturer. Perhaps check a search engine you might get lucky. Good luck..

Will this work to power a toshiba canvio 3tb external drive hdwc130ek3j1?

If I’m right check on the Toshiba canvio. Where you plug in the dc cord it should tell you the products voltage requirement.

Does it have over charge protection?

Sorry for the wait but no it does not have overcharge protect. Sorry

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Universal 9V 2A AC Adapter Power Supply AC110V to DC9V Power Controller with 8 DC Plug Adapter Converter Inverter Charger Transformer Adapter AC-DC (DC9V-2A)

Product ID: 774910635

Details

Amperage
2 Amps
Brand
GuanTing
Colour
2A
Connector type
DC Barrel
Included components
8 x DC Socket
Input voltage
9 Volts

⚡2A max current output

🔌8 interchangeable DC plug tips

🛡️Multi-layer safety protection

€ 80.71

Duties & taxes included

In stock

Sold byAmazon CyprusDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔋 Power up your gear, stay ahead of the curve!

CERTIFIED QUALITY - CE, FCC, and DoE VI certifications ensure premium reliability and energy efficiency.
COMPACT PORTABLE - Lightweight 0.1kg design with easy wall-mount and plug-and-play convenience.
ROBUST SAFETY SYSTEM - Built-in over-voltage, over-current, short circuit, and surge protection for worry-free use.
UNIVERSAL COMPATIBILITY - Seamlessly powers 9V devices from tablets to Arduino boards with 8 plug tips included.
SMART CHARGING INDICATOR - Stay informed with a clear LED charging status, no guesswork needed.

The GuanTing Universal 9V 2A AC Adapter is a versatile, high-quality power supply designed for a wide range of 9V DC devices. Featuring 8 interchangeable plug tips, multi-layer safety protections, and certifications like CE and FCC, it delivers reliable 18W power with smart charging indication. Perfect for professionals and tech enthusiasts who demand dependable, adaptable power solutions.

Specifications

ASIN	B087ZWS7CG
Amperage	2 Amps
Brand	GuanTing
Built-In Media	8 x DC Socket Tips
Color	2A
Compatible Devices	Android Tablets, Webcam, Routers, Toys, Recorder, Bluetooth Speaker, Arduino UNO MEGA, Radio, Security Cameras, CD Player, etc.
Connectivity Technology	Easy Plug and Play
Connector Type	DC Barrel Connector
Current	AC
Current Rating	2 Amps
Customer Reviews	4.4 4.4 out of 5 stars (1,404)
Enclosure Material	Acrylonitrile Butadiene Styrene
Form Factor	Compact and portable design with interchangeable DC plug tips
Frequency Range	50-60Hz
Input Voltage	9 Volts
Item Weight	0.1 Kilograms
Main Power Connector Type	2 Pin
Manufacturer	GuanTing
Mfr Part Number	GT-0902000
Model Number	GT-0902000
Mounting Type	Wall Mount
Number of Items	1
Number of Power Levels	1
Output Current	2 Amps
Output Voltage	9 Volts
Portable	No
Power Plug	Type A - 2 pin (North American)
Power Source	Corded Electric
Special Features	Charging Indicator, Short Circuit Protection
Specification Met	CE, FCC
Unit Count	1.0 Count
Voltage	9 Volts
Wattage	18 watts

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