Yep very handy indeed. I got mine for 9USD and used 8pcs of 21700 4000maH Molicels. It can power dc device from 3.3V to 24V. On the Nova S, it consumes 0.1A when idle and at almost 2 hours of use the display says 76%. I charge it with my laptop charger. Oh yes, it can also power my laptop, a...