That page implies good battery life:
"A 6000mAh battery means you have a companion that will be there for you, through use and at times other devices have given up long ago."
But if you look deeper you find on their wiki:
https://pyra-handheld.com/wiki/index.php?title=Battery
"Everyday work load: 8 hours (without any power management features, tested on prototype April 2016)"
8 hours? This is a toy. Why is their headline figure "6000mAh" instead of "8 hours"? Because they know it's shit.