I decided to finally fix an 'old' roomba 500 that had not operated for a year.
I upgraded the bin with the aerovac bin, changed the brushes with the ones that come in the aerovac kit, and changed the dead battery with one of those Tenergy batteries on eBay
After a complete charge and run, everything seems to be working better than new.
However, I noticed something unusual when charging, there is a ticking noise (similar to a clock) when the roomba is on the dock (whether charging is complete or not). I don't care about the noise itself because of where the dock is located, and the noise is very low anyway. But I was wondering if it was signaling some potential problems with the battery.
Anybody has experienced this?