Zumio will get warm to the touch when charging.  This is normal, the housing gets to approximately 40Celcius (100Fahrenheit) when charging.  This is warm for human touch but safe and its actually cool for electronics and plastics which are happy running at much higher temperatures.  The product has been extensively tested by third-party labs in [...]

Your Zumio is in lockout mode.  Hold the power button down for at least 5 seconds until the unit pulses 3 times.  This takes it out of lockout mode. Try the Zumio again, it should now be working fine.