Li-Ion Scooba Charger Stand

I recently upgraded my dying IRobot Scooba 390 battery to 4 Li-Ion cells and had to take the pack out every time to charge them with my RC charger. Now, I can just take the battery out, place it in this fancy new dock, and that't it!

I got the charger off amazon, used two automotive spade connectors, soldered some wires to those and the 12v connector and swapped the charger's alligator clips for a standard 12v plug. Pretty simple :)