I think you need to charge evive either using USB cable (Please put evive in Power EXT mode and the orange indicator LED will glow) OR connect any DC charger. Full charging takes about 6-8 hours. evive can run 2 DC motors upto 2 hours. It can give output current of ~1A max and ~5V.
In case, you have any battery, than you can use that also for more power. [For more power with external battery, please put the JP1 Jumper on VSS side (located above touch pin female headers).