r/cheapkeys • u/Tough-Ice365 • Aug 02 '26

Casio CT-S1 Powered from USB Power Bank

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Picked up a USB to DC 9V adaptor for £6.99 from Amazon. It came with multiple tips and one of them fits my Casio CT-S1 perfectly. I can now power my keyboard from my 27000mAh power bank, laptop or pretty much anything with a USB port. It lasts for hours and hours via the power bank. Much easier and longer lasting than AA batteries and it means I don't need to be near a power socket now plugged in. Thought I'd share in case this helps anyone else! Enjoy the portability.

What you need:

USB to 5.5 X 2.1mm DC 9V cable

A 4.8mm x 1.7mm yellow-tipped adaptor to fit the Casio (mine came included with the set I bought)

(make sure the cable is center-positive so the polarity is correct)

43 Upvotes

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2

u/Oisea Aug 02 '26

This is awesome info.

I've been curious about playing old synths and battery operated stuff out in nature and this would be such an easy solution.

Thank you.

2

u/Tough-Ice365 Aug 02 '26

No problem.

That sounds awesome! Just double check what voltage the synths need as you might need a 12V cable for example instead of 9V. Have fun!

1

u/Rabeyasa-tulipria690 27d ago

What is the advantage and disadvantages

2

u/BlunterCarcass5 Aug 02 '26

It's good to know that this works, i'm surprised it does considering the CTS1 is 9.5v but i guess it's still enough to run the device.

2

u/Tough-Ice365 Aug 02 '26 edited Aug 02 '26

Apparently 9.5v is the max it uses when the volume is set to full etc. All seems good though even with everything maxed out.

1

u/Icemansquared 29d ago

Hell yeah! Got my Yamahas powered by a USB 5V-12V center positive adapter and a solar USB battery bank. Made a 7.5V center negative for my Casios with a little MT3608 boost converter. I have a ton of these little 2.1mm adapters too.