Good product, battery lasts for days. Handy and portable as expected. Adaptor? No way, any USB will charge it. Double tap: lantern, great if you need to check some connections or settings on the shade. But some precaution is needed: on my TO800 there was an annoying whistle, way higher than any hiss, buzz or hum. After I suspect everything from cables, pickups, pedal, amp and neighbors, I use another 9V adapter instead, for testing, which does not prodece any noise. It proved there are some switching spikes (it is a power switching supply inside) from this powerbank who interferes with the analog stompbox to generate the annoying whistle. One capacitor (1000uF/16V) solved nicely the issue, but I need to place it on the stompbox side as I did not take the chance to open the powerbank glued case. I need to check every device I will use from now on, to avoid embarrasing audience, recordings and myself. I wish such a capacitor to be fitted inside by design, to use it with confidence for full five stars.