This is our absolute favorite battery! Samsung is a very reliable manufacturer, and this battery works very well for high capacity battery banks - i.e., a set of batteries in parallel. In this configuration, the 10 amp capacity is actually never utilized, and we use 8 batteries, for an 80 amp capacity. We only use a few amps into a battery voltage (2.5 to 4.1 approximately) to 5V USB convertor, with a 2.1 amp output and a 1 amp output.
This is used via the 2.1 anp output into a USB cable with a...