Would it melt the insides if I solder the wires into the terminals

Depending on how long you spend soldiering the wire on ,shouldn’t be a problem though , properly terminated crimps are good enough though

Can this be used with a vehicle having +ve earth battery

I don't think so. The LED display is probably wired to work with conventional negative earth batteries. I would emphasize this is just my opinion. It probably could be got round but you would need to know what you are doing!

would this charge a macbook air via usb c port?

This charger can charge the macbook air via USB C Port , but you have to make sure your vehicles can provide enough voltage 24V, and use the original cables or third-party authorized cables. Normally, the truck, boat can provide more than 24V volatge. But it cannot charge the macbook air via the USB C port in MOST cars which can provide only 12V.

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Quick Charge 3.0 Car Charger Socket 12V/24V 36W Aluminum QC3.0 Dual USB Fast Charger Socket Power Outlet with LED Voltmeter for Marine, Boat, Motorcycle, Truck, Golf Cart (Dual QC3.0 (Blue))

Quick Charge 3.0 Car Charger Socket 12V/24V 36W Aluminum QC3.0 Dual USB Fast Charger Socket Power Outlet with LED Voltmeter for Marine, Boat, Motorcycle, Truck, Golf Cart (Dual QC3.0 (Blue))

Product ID: 111503306

Details

Amperage
3 Amps
Brand
GemCoo
Cable length
23.7 Inches
Colour
Dual QC3.0
Compatible devices
Smartphones
Compatible phone models
Smartphones

⚡36W Dual QC3.0 Fast Charging

🔋Real-time LED Battery Voltage Display

🔵Dual USB Ports with Blue QC3.0 Tech

HK$234

Duties & taxes included

In stock

Sold byAmazon Hong KongDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Charge smarter, drive safer — power up with precision!

SMART LED VOLTMETER - Instantly monitor your vehicle’s battery health with a clear digital voltage display.
EFFORTLESS INSTALLATION - Simple positive/negative pole setup with optional on/off switch compatibility—plug and play convenience.
COMPREHENSIVE SAFETY SHIELD - Built-in overload, overvoltage, overcurrent, and short circuit protection for peace of mind.
RUGGED ALUMINUM ALLOY BUILD - Premium metal body ensures superior heat dissipation and durability for long-lasting safety.
LIGHTNING FAST DUAL CHARGING - Two 18W QC3.0 ports deliver 4x speed for your devices—never wait to power up again.

The Quick Charge 3.0 Car Charger Socket by GemCoo features dual 18W QC3.0 USB ports for ultra-fast charging, housed in a durable aluminum alloy body that prevents overheating. Equipped with a digital LED voltmeter, it provides real-time battery status monitoring. Designed for vehicles from motorcycles to trucks, it offers comprehensive safety protections and easy installation, making it the ultimate power solution for on-the-go professionals.

Specifications

ASIN	B07NV7579D
Amperage	3 Amps
Best Sellers Rank	299 in Mobile Phone Automobile Chargers
Box Contents	1 adapter, 1 USB cable (23.7 inches with 10A fuse)
Brand Name	GemCoo
Cable Length	23.7 Inches
Colour	Dual QC3.0 (Blue)
Compatible Devices	Smartphones, Tablets
Compatible Phone Models	Smartphones
Connectivity Technology	USB
Connector Type	USB Type C
Country of Origin	China
Current Rating	10 Amps
Current Type	DC
Customer Package Type	FFP
Customer Reviews	4.6 4.6 out of 5 stars (3,993)
Enclosure Material	Metal
Form Factor	Car Charger Socket
Input Voltage	24 Volts
Main Power Connector Type	USB
Manufacturer	GemCoo
Manufacturer Part Number	SFG-01
Model Number	SFG-01
Mounting Type	Wall Mount
Number of Items	1
Number of Power Levels	1
Output Current	3 Amps
Output Voltage	6 Volts (DC)
Portable	No
Power Plug Type	No Plug
Power Source	AC
Special Features	Fast Charging
Total USB 2.0 Ports	2
Total USB 3.0 Ports	2
Total USB Ports	2
UPC	670046147771
Unit Count	1.0 count
Voltage	24 Volts
Wattage	36 watts

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