I have an iRobot / roomba 860
The original battery would no longer take a charge. I purchased a new battery on eBay.
That battery worked ok for a while then I kept the base unllugged for a while and it must have completely discharged.
I purchased another battery. It worked for a while but now is no longer taking a charge.
I was careful to keep it plugged in and not discharge. We’ve had the roomba for about 8 years just wondering if anyone has run into similar issue and if something might be wrong with charging mechanism inside roomba ?