The verdict
A screw-lock clamp that grips any power bank tight — none of the spring-clamp anxiety about a heavy bank slipping — and mounts to a cage, clamp or accessory.
What’s good
✓ Knob locks down on the bank (2.17″–3.35″ wide)
✓ Holds heavy banks (like a big Anker) with no worry about dropping
✓ Two screw slots plus 1/4″-20 holes to mount it anywhere
✓ More secure than a spring-loaded holder
Worth knowing
· Wider or thicker banks can stick out the top a little
It’s what powers my slider rig — the knob makes it easy to trust with a heavy pack.
Where to buy
Sirui Universal Power Bank Holder Clamp
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Creator Gearbox 
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