If you use your Laptop/Tablet/Desktop Computer for work, you are able to claim a deduction for the work-related use. The usual way of claiming this device is through the depreciation of the device. The effective life of these assets is labeled out below:
Laptop - 3 Years
Tablet - 3 Years
Desktop Computer - 4 Years
Similar to your mobile, you must keep a diary log of the time you use the device for work, this log must be kept for a 4 week period.