If your Robot doesn’t move power is simple: just plug it into the wall.
If your Robot does move things are very different. This almost certainly means
batteries. Lots of batteries. After all, getting several hundred lbs of Robot moving needs considerable power.
While there are many types of batteries available today (Li-ion, Nickel metal
hydride, and many others) it is probably best to stay with a known and well established type of battery, they are much
cheaper then more cutting edge technology. In this case this means lead acid batteries just like in your car. But not exactly
like car batteries, slightly different.
Conventional lead acid car batteries have liquid acid in them that can, and
often does, leak out. Strong acid and its fumes can do major damage to your Robot. Today there are lead acid batteries that
are slightly different in that they are sealed and use fiberglass mats to absorb the liquid acid so that there is actually no
liquid acid to leak out. They are known as AGM (Absorbed Glass Mat) batteries. There are at least 2 different types of AGM
batteries out there: conventional (with flat plates) and Optima (with spiral wound plates).
Optima batteries are a bit large and are expensive so I used just standard
flat plate AGM batteries.
AGM batteries come in many different shapes and sizes. I picked the biggest
I could fit in the space I had: