Try connecting your iPad cable for the USB power adapter and plug that into an outlet. Apple has stated it does not guarantee that your iPad will charge on older MACs and PCs.Your computer most likely has functions that will allow you to control the power features. You may be able setting your computer to work or function at reduced processor speeds. Sure it will slow your pc down and you will be limited on certain capabilities but the gs battery 12v 40ah may last much longer when you turn…See More