The EP-0136 UPS PLUS which is sold on Aliexpress: https://de.aliexpress.com/item/33012132000.html?spm=a2g0o.cart.0.0.677f4ae4MCYo34&mp=1&gatewayAdapt=glo2deu 1. Offers charging over usb and does not require a special power adapter. 2. It is stackable to exand the power capacity. 3. And it offers more new features. But is the tutorial of the EP-0136 UPS PLUS: and the WIKI: https://wiki.52pi.com/index.php?title=EP-0136&spm=a2g0o.detail.1000023.17.757cjAi4jAi4Ij not difficult to …