Hi Audrey
This is a computer, and as such, has a limited battery life. It can be extended by lowering the brightness and sleep mode. The fact is, I don't even care, as I plug it in with my keyboard etc. In all the jobs i've played, I haven't ever had to put it on battery, except one. I forgot to bring my cord and was happy that it had battery backup.

Bernie
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pa4X 76 ,SX900, Audya 76,Yamaha S970 , vArranger, Hammond SK1, Ketron SD40, Centerpoint Space Station, Bose compact