Uncompromising Quality The Lithium Cube is a culmination of 30-years worth of power supply knowledge with cues taken from our popular jump-starter, power inverter and Solar Cube lines. That knowledge cultivated the perfect lithium power supply, 1 that was full-featured with a solid build quality, could be used anywhere and is reliable as all can be. Simplicity We designed the Lithium Cube to be user friendly and accessible to everyone, everywhere. No proprietary plugs, no special connectors, no hassle finding compatible accessories, our Lithium Cube will work with the set-up you already have and with readily-available components. Powerful The Lithium Cube 500 is no slouch, with a 500-Watt PSW inverter paired with the 515 Wh lithium-ion battery, you'll have the power you need to get the job done. Whether you need to power a battery charger, CPAP, laptop or lighting for remote photography, we have you covered. Pass-through Charging 1 gripe that we've seen with other units is that they cannot be used while charging, not so with the Lithium Cube. You can charge the Lithium Cube and use it at the same time. how cool is that. Need the unit to be recharged even faster. Recharging time can be shortened if you use 2 charging types at the same time (You can recharge via AC and USB-C concurrently).