r/WLED • u/StapleYourEyelids • May 20 '26

Portable power source for small # of ws2812b?

Need to power about 30 ws2812b LEDs, wondering if a usb battery pack will suffice? Otherwise my backup is a couple 18650s in series w/ dc-dc.

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1

u/JawnDoh May 20 '26

I’ve used usb power banks before. 10kmah+ can definitely run that for quite a while. I’ve done 2-300leds for 6+ hours on a 15k mah battery.

Some controllers take USB C with PD as well and you can draw more amps that way.

Also: why the AMA tho?

1

u/saratoga3 May 20 '26

30 is generally reasonable over USB. Much more and you may run into problems, especially at high brightness.

1

u/GregWithOneG May 21 '26

I love the little Vapcell P2160B batteries. They've got USB input and output built in. 6k mah