Can this coverter's input wires be safely connected directly to a car battery?

Yes, they can be direct connected to batteries. The poster saying you can't because a car battery has too many amps is wrong devices only draw the amps they need. Hook a 1 and 10 amp device to the battery at the same time, each device will draw 1 and 10 amps respectively. Also agree with them, if you do it protect it with a fuse otherwise if the device fails/shorts all the power of the battery will go through the device and it will likely catch fire. If protected by a fuse, the fuse will blow.

What size fuse do I need for that?

You could look in your vehicles owners manual and determine what size fuse runs whatever circuit you're tying in to... I tied it to the cigarette lighter so look in owners manual for fuse size of cigarette lighter circuit.

Does this get hot? I was thinking about using double sided tape to stick it to a plastic car interior part

No, it won't. Please kindly note that the power of the device must be less than 15W when using a voltage converter.

Does the converter draw any power if no usb device is plugged into it?

It doesn’t draw any until something is plugged into it. Once pos and neg are hooked up it is always hot. It’s put together nicely too, I’m happy with it.

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DC Converter Voltage 12V to 5V 3A 15W Buck Converter Module, DC Reduced Voltage Regulator Car Power Adapter with Output Power Adapter

Product ID: 287791001

Details

Brand
Weewooday
Color
black
Input Voltage
12 volts
Item Weight
17.87 g
Output Voltage
5 volts

⚡96% efficiency power conversion

🔌Dual USB ports for simultaneous charging

🛡️Smart multi-protection chip

36.26 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔋 Power up smart, stay connected stronger.

DUAL USB CHARGING PORTS - Charge two devices simultaneously without compromise—perfect for the multitasking professional on the go.
VERSATILE COMPATIBILITY - Ideal for GPS, dash cams, car audio, and more—power your essential tech with confidence everywhere you drive.
COMPACT LIGHTWEIGHT DESIGN - At just 17.87g, this sleek module fits seamlessly into your car setup without bulk or fuss.
ROBUST INTELLIGENT PROTECTION - Stay worry-free with built-in overvoltage, overcurrent, overtemperature, and short circuit safeguards.
ULTRA EFFICIENT POWER CONVERSION - Maximize your device uptime with a stellar 96% energy conversion rate, minimizing wasted power and heat.

The Weewooday DC Converter efficiently steps down 12V DC input to a stable 5V output at up to 3A (15W max), featuring dual USB ports and a smart microprocessor chip that ensures comprehensive protection against electrical faults. Lightweight and compact, it’s designed for reliable power delivery to multiple car electronics, making it an essential upgrade for tech-savvy drivers.

Specifications

ASIN	B08R64L68D
Best Sellers Rank	#367,958 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,654 in Power Converters
Brand	Weewooday
Color	black
Customer Reviews	4.6 4.6 out of 5 stars (336)
Input Voltage	12 volts
Item Weight	17.87 g
Manufacturer	Weewooday
Mfr Part Number	Weewooday-DC Converter-01
Model Number	GSS4291
Number of Items	1
Number of Outlets	2
Number of Packs	1
Output Voltage	5 volts
Plug Type	Cigarette Lighter Plug
Power Source	DC power supply
Unit Count	1 Count
Warranty Description	when using a voltage converter, the power of the device must be less than 15W; The DC reduced voltage converter is not compatible with partial Samsung phones

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36.26 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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2 months ago

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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