We made this shed from a plan called an “Irish Shed.” The walls are cedar logs that we cut from our property and placed on their sides, secured with a special mortar mix. The frame is made from four-by-six treated lumber with lap joints and rebar through them (very strong). I made the door from cedar boards.
When using your laptop computer at home, put the battery charger (an AC adapter) on a power strip that can be turned off. The transformer in the charger draws power continuously, even when the laptop is not plugged in.