This page has three parts. Part one (this one) covers the disassembly of the Dirt Devil and the replacement of its chip with a WEMOS D1-D2. This adds the feature of controlling the Dirt Devil over Wifi. I think it works pretty well, but lacks some features like ...
Libero (M606) and Spider (M607) Ni-MH 800mAh/14.4V Plus.Parts Battery for Dirt Devil
NiMH-battery - 2500mAh (14.4V) for robotic vacuum cleaner home cleaner household robot Dirt Devil Spider 2.0 M612 - Electropapa