Is there a Battery Tender Adapter that fits a USB port?

[Mikey4201]

Know of such a thing?

 

[RayBJ]

No!
USB is 5v DC
Battery & tender are 12v DC.

 

[Bfromla]

Found this at HD



I'm guessing it reduces the voltage.:dontknow: I haven’t tested, I have other methods



& an appropriate USB cig plug



It's a truck stop find; double light/glass breaker/usb charger W/magnet. Thankfully, I don’t “need” it, but it's handy when I want just top off a device or something.

 

[racoon]

Found this at HD

View attachment 208912

Except I believe the original question was whether they could charge a battery by plugging it into a USB port, not if there was an adapter that allowed you to charge a USB device attached to a 12v battery?

 

[Allen42]

They make some for the old cigarette lighter sockets which were 12v, but no such thing for the 5v USB ports.

 

[2dogs]

Don't try pushing 12v backward through a USB port. You won't like the results.

 

[Peter Aawen]

.....

& an appropriate USB cig plug

View attachment 208914

It's a truck stop find; double light/glass breaker/usb charger W/magnet. Thankfully, I don’t “need” it, but it's handy when I want just top off a device or something.

Just a word of warning - I'd be very wary of leaving one of those ^^ plugged in ALL the time, altho plugging it in 'every once in a while' to keep it charged up &/or while using it for a short period might not be such an issue... :dontknow:

The reason I say this is that I personally have witnessed vehicles burning to the ground as a result of these things being left plugged in all the time - after some months of no apparent concern, they eventually fail, burst into flames, and the vehicles can burn sufficiently hot that they are totally lost. And this was not just one vehicle, or one occasion - I witnessed it happen to two vehicles on separate occasions, and both times we were too far from any fire service assistance that there was absolutely nothing we could do but to watch them burn!! :gaah:

After I saw the second one go up in flames and eventually worked out the cause of the fire, I did some further digging, and discovered that right around Oz, those 'cig lighter plug-in torch/adapter' things feature fairly often in the 'likely causes' of vehicle fires, especially if they've been left plugged in for some time... :banghead:

Don't try pushing 12v backward through a USB port. You won't like the results.

And :agree: with that ^^ too - see the 'vehicle fires/burning to the ground' comments above for potential outcomes; even if that might be somewhat out toward the extreme end of the 'potential results' scale, they still happen! :lecturef_smilie:

Just Sayin'

 

[700wolvy]

This connected to my battery tender leads. I just leave it in the frunk just in case - USB Cable

https://www.amazon.com/dp/B01MSK7ZAV?psc=1&ref=ppx_yo2ov_dt_b_product_details

I just use this part.

 

[troop]

This connected to my battery tender leads. I just leave it in the frunk just in case. USB Cable
I just use this part. View attachment 208986

Great for powering cell phones, music devices or comm devices. Wouldn't use it for anything else.