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Jaycar
USB Cables
Universal USB 9V Step-Up Power Cable

Inner contact: positive + | outer contact: negative -
Polarity is fixed.
Absolute genius! This adaptor provides you with 9V output from a common USB socket (usually 5V output). Useful for powering all sorts of 9V devices direct from a computer or other USB charging source such as a battery bank. 9V @ 1A rated output when connected to a high power USB outlet. Includes 7 standard DC tips to suit your device.
 
Note: Your USB port must be equipped for high current (2.1A or greater). Some USB ports (particularly those on some computers) are 500mA rated. The device will work perfectly, but will not be able to provide the full 1A current at 9V if connected to a low power USB socket.

DC Current Draw:1.0A,2.5A

Universal USB 9V Step-Up Power Cable

Cat. No: PP1976
3.7(3)
$19.95
Bulk Pricing
Buy More, Save More! Bulk pricing applies automatically in cart.
Qty 1-2
$19.95 / unit
Qty 3-5
$17.95 / unit
Best Value
Qty 6+
$15.95 / unit
30-Day Returns
Australian Stock
Warranty Included
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Customer Reviews

Bazaarvoice Authentic Reviews

3.7

3 reviews

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Does the job

EricMarch 2026

Good gadget to power various electronics from guitar pedals to differential probes. As others have said, the end bit is compatible only with centre-positive devices unless you cut the wire or open up the adapter end to reverse the wiring. As it only allows you to plug the end in one way (the pins are sized differently). Output voltage is around 9.3V without any load, lead is a little shorter than I would like at around 40cm? And yes, it works even on USB ports with 500mA limit as long as the 9V end doesn't draw more than 250mA-ish. Been working well powering differential probes that's been chewing through batteries.

Helpful?

jondnzApril 2025

It is not truly "universal" as the pins and holes are configured in a way that mean they only fit one way around. This means you can't actually change the polarity configuration on it and it can't be used with "tip negative" products Apart from this slight design flaw it does the job as intended

Yes, I recommend this product.
Helpful?

Does what it says on the tin (mostly)

Gene EricNovember 2025

I bought this around a year ago to run guitar pedals and a small amp off a powerbank. Despite the product name having the word "universal" in it, the tips only fit together with CENTER POSITIVE polarity. For my application, I had to open the case and solder the output wires the other way around to switch the polarity.

Yes, I recommend this product.
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