Hi, I'm having a little trouble with the battery pack in my roomba. As a self respecting EV advocate I like the idea of a self propelled EV that cleans the floor for me ;-)
It's been a few months since I last used the Roomba. I don't remember whether the charger has been plugged in the whole time or not. When I went to use it this morning the charger was unplugged and the power indicator did not respond. So I plugged the charger in, the red charging light started blinking, and after awhile it turned green.
It gets maybe 2 minutes run time once the light is green. I've gone through this twice now, charge it to where the light is green and set it going and get 2 minutes of run time.
In the past it would do maybe 20 minutes of run time.
If this were an e-bicyclist or e-scooterist reporting a similar problem I'd be thinking "uh oh, it's likely by leaving the battery off the charger that the battery self-drained and is now damaged and will never hold a charge again". e.g. lead acid batteries if left discharged for awhile don't hold a charge. On the other hand if it's a lithium or NiMH pack then leaving it partly discharged doesn't cause damage.
My question is -- maybe someone knows what kind of battery is in the Roomba battery pack?
Maybe someone knows something about the charging behavior of the Roomba? Like, if the light turns green that should mean its fully charged but maybe it's lying and I'm really supposed to leave it for a long time.