Now why would you do THAT?

  I am not 100% sure where this is going, but it's going to be a fun journey...   I own an iRobot Roomba 630 floor cleaner, and it works well enough for our house.  But I discovered the iRobot "Create" which is designed for teaching and hacking in general.  As you can imagine, repurposing our cleaning robot for my hobby might not sit too well. Using the local social networks, I picked up an iRobot "Scooba" for nothing.  According to the previous owner, it won't charge and the power light glows red when you plug it in. I downloaded the service manual from one of those manuals websites, and learned this is likely to mean that the battery has failed and won't hold a charge.  I figured I could probably re-pack it and things would be sweet. As with so many of my projects, the problem was a little more complex than I expected.  The reason why it won't charge is that the battery was missing, rather than simply faulty.  Given it's a specialised package, ...