Joyo JP-06W ZGPW Power Converter

Having just spent an hour using this product intensively; This product works 100%. PLEASE READ BELOW FOR YOUR SAFETY BEFORE ATTEMPTING SIMILAR TEST ON YOUR EQUIPMENT.
1. I plugged into: Electro Harmonix POG2 (Poly Octave Generator requiring centre-neg -9V- sucking up 1.8ma ...according to adapter specs.)
2. Centre Negative = Yes (out of the box correct...check your effect box before use...just in case you have a positive centre-pole!)
3. 1 hour use: slightly warm after 1 hour non-stop playing.
4. Powered by an (old) thinline phone battery pack (Specs: DC 5V/1A-Output DC5V/1A...4000mAh/14.8Wh)
5. Used one charge-light (out of 5)...no glitches/switch-off's etc
6. POG2 pedal running through a Roland Mobile amp running on its own battery power.
Please note: Knowing your equipment is 9V is not enough info if you wish to have success and safe use! Make sure you check the amount it requires (e.g. 1ma-2ma-or much more?). JOYO claim you can go up to 400ma...though I would suggest staying below that mark especially if you have an expensive pedal/effects box.
Like? YES...IT WORKS AND IS EXACTLY WHAT I NEED TO GO MOBILE.
Cons: None so far...time will tell if it remains reliable and doesn't break the pedal electronics at a later stage.

I bought, received and tested this very useful little device:

I connected it's input to a recently bought SilverCrest 10.000 mA powerbank, which was fully charged.
The output was connected to my Zoom G3Xn multi-effect-processor, that is normally powered by a 9V DC - 500 mA wall-charger (which means it will consume about 400 mA, the maximum that the 'Joyo' can deliver).

- The Zoom G3Xn became immediately active and was continuously used during 7 hours and 45 minutes, after which the SilverCrest powerbank was empty.

- Power dissipation was transformed into a hardly noticeable rise of temperature near the output section of the 'Joyo'-device, which is remarkable, since it had to deliver it's maximum all the time it was used.

- There was no measureable (noise) influence on the audio-signal: It was absolutely clean.

Conclusion: This is an excellent little devil, very useful on stage, and can be considered a gig-saver there!

Don't expect this to power professional rig first of all.
However, for playing around with couple of pedals, it's fantastic! No noice as it's completely separated from the grid and very convenient. I use it at home for mini boards that I put on the fly. Atm my setup is: Visual Sound Jekyll & Hyde drive + Boss FRV-1 reverb + Cmatmods delay, daisy-chained from 10000 mah power brick using this converter. Daisy-chaining is not an issue using power bank. Lasts for hours. Would be confident to perform with it with backup power supply.

Pros:

Portable, compact, practical and silent. Eliminates need for power socket.

Cons:

ON/OFF switch on the adapter. Not a big deal, you can always unplug it from power source but still would be nice.