DC step down converter - charger?

[Mixzzz]

So I was thinking of adding usb charging ports to my car and I don't really want to buy expensive car chargers to chop them up. Cheap ones don't make sense as they usually can't even supply 2.1A. I was thinking of maybe just getting 12-5v DC step down converter and just basically soldering USB ports with wires to it so I can basically have multiple outlets around the car with only 1 source.

 

I was thinking of something likes this - https://www.ebay.com/itm/12V-24V-To-5V-10A-50W-Car-Step-Down-Power-Supply-Buck-Converter-Module-66/283348479243?hash=item41f8e2ad0b:g:zpgAAOSwRGhcRrNe:rk:4:pf:1&frcectupt=true

 

Anyone has any reasons not to do this? I don't care about QC as my phone doesn't really benefit from it.

[W-L]

3 minutes ago, Mixzzz said:

So I was thinking of adding usb charging ports to my car and I don't really want to buy expensive car chargers to chop them up. Cheap ones don't make sense as they usually can't even supply 2.1A. I was thinking of maybe just getting 12-5v DC step down converter and just basically soldering USB ports with wires to it so I can basically have multiple outlets around the car with only 1 source.

 

I was thinking of something likes this - https://www.ebay.com/itm/12V-24V-To-5V-10A-50W-Car-Step-Down-Power-Supply-Buck-Converter-Module-66/283348479243?hash=item41f8e2ad0b:g:zpgAAOSwRGhcRrNe:rk:4:pf:1&frcectupt=true

 

Anyone has any reasons not to do this? I don't care about QC as my phone doesn't really benefit from it.

Theoretically speaking it will work but you can get premade units with ports and everything ready to go. Main thing you have to worry about with small units like this is the potential for standby power if you were to directly wire it to your battery, I would suggest to have it on a power on 12V line in the car so it gets power cut when you turn off the key. 

https://www.ebay.com/itm/XL4015-4-USB-Port-DC-DC-12V-24V-to-5V-5A-Buck-Converter-Power-Supply-Step-Down/172746506619?hash=item28387e817b:m:mf4NtMMqvoD6ZQ2lChOseyA:rk:10:pf:0

[Mixzzz]

2 minutes ago, W-L said:

Theoretically speaking it will work but you can get premade units with ports and everything ready to go. Main thing you have to worry about with small units like this is the potential for standby power if you were to directly wire it to your battery, I would suggest to have it on a power on 12V line in the car so it gets power cut when you turn off the key. 

https://www.ebay.com/itm/XL4015-4-USB-Port-DC-DC-12V-24V-to-5V-5A-Buck-Converter-Power-Supply-Step-Down/172746506619?hash=item28387e817b:m:mf4NtMMqvoD6ZQ2lChOseyA:rk:10:pf:0

Oh yeah, I'm not going to wire it directly to battery, I was thinking of wiring it trough the ignition(turns on in acc position). Since this isn't a very high current stuff, I though of using fuse tap(to lazy to pull the fuse box and add a terminal in empty spot ) Ok, so it looks like my idea works, thanks

[W-L]

9 minutes ago, Mixzzz said:

Oh yeah, I'm not going to wire it directly to battery, I was thinking of wiring it trough the ignition(turns on in acc position). Since this isn't a very high current stuff, I though of using fuse tap(to lazy to pull the fuse box and add a terminal in empty spot ) Ok, so it looks like my idea works, thanks

I'd still probably put it on a fuse or splice in one of those quick inline ones in case something did go wrong even if it is relatively low power.

[SupaKomputa]

I just get another socket wired to the current one and get a decent usb plug.

Car socket have unstable voltage, a plug is easier to replace if broken.

[mariushm]

I wouldn't trust those things in my car.

Car chargers aren't that expensive, you can buy decent ones for less than 10$, see for example the brand "anker" : https://www.amazon.com/s/ref=nb_sb_noss_2?url=search-alias%3Daps&field-keywords=anker+car+charger

 

This one's 9.99$ : https://www.amazon.com/Anker-Charger-PowerDrive-iPhone-Nexus/dp/B00VH84L5E/

 

 

[Aniallation]

There's actual flush mount devices for this.

 

https://www.amazon.com/Qunqi-Charger-Socket-Outlet-Carvans/dp/B00VHC04NI/ref=sr_1_2?ie=UTF8&qid=1549336272&sr=8-2&keywords=12v+flush+mount+usb

 

I run 2 of these in my cars and they work great.