Well, I started to make a video of this thinking it was going to be a great new uninterruptable supply. I’d listened to others, I’d read the spec (or so I thought) and this was to be the new saviour of battery supplies.
The TOMO unit comes in different sizes, I chose the 3-battery solution. I bought mine from AliExpress. It has a USB input and 2 USB outputs and can power up to 2.1 amps in TOTAL (2.1 amps out of one output OR 1 amp out of the other – must use the same chip as everyone else).
It is nice looking and comes MINUS the batteries and hence is cheap. You can use one battery or more – either way it still acts as a power supply.