This is the Nisplay ( niceplay) L1 tennis ball machine. This machine was purchase on Kickstarter and was just delivered to me a few days ago. Its it new on the market.
It boast an impressive 11lbs without the oscillator. It is very portable and lightweight. With oscillator it is around 21lbs. Nisplay has a battery life of up to 2.5hrs on court, can hold up to 50 balls and has a removable battery.
See nisplay website for more info.