Inside a wafer-thin USB powerbank.

When I saw this powerbank I had to get it, purely because it was so thin. I did another test on its performance and it barely manages to put out 1A at 4V before cutting out, so probably better suited to lower loads, but not too low or it goes into standby. This makes its use as a powerbank a bit limited.
On a plus note, the unit came with a decent charge already in it, probably because of its low load standby function.
I'd rather it had been the simpler type that puts out 5V all the time and just keeps it topped up to meet demand. That would make it useful for powering very low loads like lights.
It does have full secondary battery protection that doesn't rely on the boost chip.
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