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Navy-Wife | Staff 29.4K Views
Jun 4, 2025 5:38 PM

Rombica 2-Port Up to 75W Car Charger (1x USB-C, 1x USB-A) w/ 2-Pack USB-C Cables

$4.05

$8.99

54% off
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iHPower Labs Inc via Amazon has Select Rombica Car Charger on sale from $4.04 when you visit the 50% off coupon page to activate (or clip the 50% off coupon on the product page). Shipping is free with Prime or orders $35+.

Thanks to Deal Hunter Navy-Wife for finding this deal.

Note: Refer to the individual product page for complete details regarding the charging rates for these car chargers.

Available (prices after 50% off coupon):

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Editor's Notes

Written by Corwin | Staff

Original Post

Written by Navy-Wife | Staff
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About the Poster
Deal Details
Community Notes
About the Poster
iHPower Labs Inc via Amazon has Select Rombica Car Charger on sale from $4.04 when you visit the 50% off coupon page to activate (or clip the 50% off coupon on the product page). Shipping is free with Prime or orders $35+.

Thanks to Deal Hunter Navy-Wife for finding this deal.

Note: Refer to the individual product page for complete details regarding the charging rates for these car chargers.

Available (prices after 50% off coupon):

No longer available:

Editor's Notes

Written by Corwin | Staff

Original Post

Written by Navy-Wife | Staff

Community Voting

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Dave_B
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I bought a UGREEN 130W USB C Car Charger just over 2 years ago. I can personally vouch that it'll charge a laptop at 100watts.

Looks like they're still selling the same model, and there's a father's day sale going on:

https://www.amazon.com/UGREEN-Cha...B0B3D9XW8X
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24 Comments

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Jun 5, 2025 3:01 AM
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IndigoMorning6118Jun 5, 2025 3:01 AM
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26 upthumbs - no comments
Jun 5, 2025 3:19 AM
157 Comments
Joined Dec 2011
Sdcn01Jun 5, 2025 3:19 AM
157 Comments
I bought SEVERAL of these usb car chargers and wall chargers from Am., Eb. and they are overrated. With these usb car chargers, the highest amperage my Motorola was charging at 1.7amp max with good heavy and duty charging cables, while its original wall charger can charge to 2.8amp easily. Anyone has any experience on these issues? Which brands are trustworthy? What a waste of mother nature earth's resources. Thanks
Last edited by Sdcn01 June 4, 2025 at 08:23 PM.
Jun 5, 2025 3:58 AM
1.1K Comments
Joined Dec 2019
Dave_BJun 5, 2025 3:58 AM
1.1K Comments

Our community has rated this post as helpful. If you agree, why not thank

Quote from Sdcn01 View quoted comment :
I bought SEVERAL of these usb car chargers and wall chargers from Am., Eb. and they are overrated. With these usb car chargers, the highest amperage my Motorola was charging at 1.7amp max with good heavy and duty charging cables, while its original wall charger can charge to 2.8amp easily. Anyone has any experience on these issues? Which brands are trustworthy? What a waste of mother nature earth's resources. Thanks
I bought a UGREEN 130W USB C Car Charger just over 2 years ago. I can personally vouch that it'll charge a laptop at 100watts.

Looks like they're still selling the same model, and there's a father's day sale going on:

https://www.amazon.com/UGREEN-Cha...B0B3D9XW8X
3
Jun 5, 2025 4:17 AM
4K Comments
Joined Aug 2006
m3coupJun 5, 2025 4:17 AM
4K Comments
So confused, so many to choose from. Will the higher watt ones damage the car battery if left unplugged?
Jun 5, 2025 6:19 AM
112 Comments
Joined Dec 2016
NeMustangJun 5, 2025 6:19 AM
112 Comments
Quote from Dave_B View quoted comment :
I bought a UGREEN 130W USB C Car Charger just over 2 years ago. I can personally vouch that it'll charge a laptop at 100watts.

Looks like they're still selling the same model, and there's a father's day sale going on:

https://www.amazon.com/UGREEN-Cha...B0B3D9XW8X
up vote, thanks
Jun 5, 2025 6:27 AM
1.1K Comments
Joined Dec 2019
Dave_BJun 5, 2025 6:27 AM
1.1K Comments
Quote from m3coup View quoted comment :
So confused, so many to choose from. Will the higher watt ones damage the car battery if left unplugged?
Check if your car power ports shut off when the car is off. Many modern cars do this.

and what do you mean, "if left unplugged"? If it's not plugged in, nothing will happen.
Jun 5, 2025 6:33 AM
157 Comments
Joined Dec 2011
Sdcn01Jun 5, 2025 6:33 AM
157 Comments
Quote from Dave_B View quoted comment :
I bought a UGREEN 130W USB C Car Charger just over 2 years ago. I can personally vouch that it'll charge a laptop at 100watts.

Looks like they're still selling the same model, and there's a father's day sale going on:

https://www.amazon.com/UGREEN-Cha...B0B3D9XW8X
Thanks for info.

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Jun 5, 2025 12:12 PM
877 Comments
Joined Feb 2012
qwiktuneJun 5, 2025 12:12 PM
877 Comments
might as well by pass this and go straight to Temu / AliExpress and scoop em up for prob half the price if you can wait for ship lol
Jun 5, 2025 12:25 PM
78 Comments
Joined May 2016
tremolomanJun 5, 2025 12:25 PM
78 Comments
Quote from Dave_B View quoted comment :
Check if your car power ports shut off when the car is off. Many modern cars do this. and what do you mean, "if left unplugged"? If it's not plugged in, nothing will happen.
My fiance's Mazda CX-50 charging port shuts off when the car is off in the front of the car, but in the back of the vehicle there is another charging port than runs continuously. So if they have a 2nd port in the back, try that one if it needs to charge all day/night in the car.
Jun 5, 2025 4:11 PM
552 Comments
Joined Jul 2018
FantasticMoon621Jun 5, 2025 4:11 PM
552 Comments
Quote from m3coup View quoted comment :
So confused, so many to choose from. Will the higher watt ones damage the car battery if left unplugged?
Most cars limit the current from charger at 10Amps with a fuse. So the chargers cannot harm battery or port.

Thus I was thinking Max capacity would be 120W. 130W is confusing to me but I cannot talk about current technology or marketing with decades old education.
Jun 6, 2025 5:05 AM
4K Comments
Joined Aug 2006
m3coupJun 6, 2025 5:05 AM
4K Comments
Quote from Dave_B View quoted comment :
Check if your car power ports shut off when the car is off. Many modern cars do this.

and what do you mean, "if left unplugged"? If it's not plugged in, nothing will happen.
Unplugged meaning the phone is unplugged but the charger is still left in the cigarette port. My car mechanic said that it would drain the battery. Previously I had a similar charger from Verizon and the light will stay on plugged. It did drain the car battery somewhat.
Jun 6, 2025 2:48 PM
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Joined Dec 2019
Dave_BJun 6, 2025 2:48 PM
1.1K Comments
Quote from m3coup View quoted comment :
Unplugged meaning the phone is unplugged but the charger is still left in the cigarette port. My car mechanic said that it would drain the battery. Previously I had a similar charger from Verizon and the light will stay on plugged. It did drain the car battery somewhat.
I see. Well, my car's power ports shut off when the car turns off, so I can't speak to that issue. Maybe check the Amazon customer reviews.
Last edited by Dave_B June 6, 2025 at 08:03 AM.
Jun 6, 2025 2:58 PM
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Joined Dec 2019
Dave_BJun 6, 2025 2:58 PM
1.1K Comments
Quote from FantasticMoon621 View quoted comment :
Most cars limit the current from charger at 10Amps with a fuse. So the chargers cannot harm battery or port.

Thus I was thinking Max capacity would be 120W. 130W is confusing to me but I cannot talk about current technology or marketing with decades old education.
All the cars I've owned/driven have used 20 amp fuses for the power ports. So, theoretical max power would be 240 watts. However, no USB charger is 100% efficient, so I'd guess the actual power limit for USB charger output is closer to 190 watts.

If your car uses a 10 amp fuse, you'd risk blowing it with chargers outputting 100watts. The exact number depends on the charger efficiency.

Also, if you use the charger when the engine isn't running, the battery voltage will drop(as it's not being charged by the alternator) and the current being pulled from the port will increase(amps = watts/volts). So, your laptop could be pulling 100watts from the USB charger on a 10 amp fuse with no issues while the engine is running, but when you turn off the engine (or if auto engine stop activates) your fuse might blow. On a 20 amp fuse this shouldn't be an issue for a 130 amp changer.
Last edited by Dave_B June 6, 2025 at 08:03 AM.
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Jun 8, 2025 4:20 PM
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WooHoo2You
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Jun 8, 2025 4:20 PM
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Quote from Dave_B View quoted comment :
All the cars I've owned/driven have used 20 amp fuses for the power ports. So, theoretical max power would be 240 watts. However, no USB charger is 100% efficient, so I'd guess the actual power limit for USB charger output is closer to 190 watts. If your car uses a 10 amp fuse, you'd risk blowing it with chargers outputting 100watts. The exact number depends on the charger efficiency.Also, if you use the charger when the engine isn't running, the battery voltage will drop(as it's not being charged by the alternator) and the current being pulled from the port will increase(amps = watts/volts). So, your laptop could be pulling 100watts from the USB charger on a 10 amp fuse with no issues while the engine is running, but when you turn off the engine (or if auto engine stop activates) your fuse might blow. On a 20 amp fuse this shouldn't be an issue for a 130 amp changer.
Your car battery would be 'dead' (aka would not start your car) if it was only delivering 10 volts thus had the hypothetical risk of delivering 10a at 100w. ("amps = watts/volts"). We are talking about a 12 volt battery that normally should be 12.6 and 12.8 volts when the engine is off to be considered 'healthy.' If your car battery falls outside of that range you have bigger problems than a 30 cent fuse or worrying about your laptop's charge.

For reference:
-A car battery is generally considered dead or very low when the voltage drops below 10.5 volts
-To pull over 10 amps at 100 watts, the voltage would need to be slightly less than 10 volts.

LOL....so yes, when completely stranded on the side of the road with a dead battery and gaming or editing video on your laptop (to have it even ask for 100w) you could, in theory, pull 10 amps from a 100w charger. But I guess that is the way you could pass the time waiting for the tow truck Wink

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Jun 8, 2025 4:46 PM
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Dave_BJun 8, 2025 4:46 PM
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Quote from WooHoo2You View quoted comment :
Your car battery would be 'dead' (aka would not start your car) if it was only delivering 10 volts thus had the hypothetical risk of delivering 10a at 100w. ("amps = watts/volts"). We are talking about a 12 volt battery that normally should be 12.6 and 12.8 volts when the engine is off to be considered 'healthy.' If your car battery falls outside of that range you have bigger problems than a 30 cent fuse or worrying about your laptop's charge.

For reference:
-A car battery is generally considered dead or very low when the voltage drops below 10.5 volts
-To pull over 10 amps at 100 watts, the voltage would need to be slightly less than 10 volts.

LOL....so yes, when completely stranded on the side of the road with a dead battery and gaming or editing video on your laptop (to have it even ask for 100w) you could, in theory, pull 10 amps from a 100w charger. But I guess that is the way you could pass the time waiting for the tow truck Wink
You're assuming 100% efficiency in a DC boost converter, which is literally impossible. I have no idea what the efficiency of this device is, but if we assume 80%, then it would pull 125 watts from the car in order to supply 100 watts to the laptop. If the battery is at 12 volts, that would be 10.4 amps, and in danger of blowing a 10 amp fuse.
When the car is running, the battery voltage should be around 14 volts, thus it would stay below the 10 amp limit as long as you don't have any other devices charging at the same time.

I'm speaking from experience on this. Years ago, before USB-C, I used to run a laptop off an inverter plugged into the car power port. It would work just fine while the car was running, but blow the fuse nearly immediately after the engine was turned off, and that was a 20 amp fuse. So, I learned to unplug the laptop before turning off the car.

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