The Primitive Manual Dynamo is Generator that can produce power during both day and night, but it is Manual, as the name implies, and to actually produce any energy, you need to click on the green area to activate it. It produces 4U for 32 Seconds, the green part being red during this time, and an extra 8 seconds in which it turns yellow and it will stop if not activated again. It can be upgraded to the Dense Manual Dynamo.