My home base only reads 4.4dc , is that the correct voltage or should it read 22.5 like the wall charger? I was given the roomba and they said all it needed a battery so bought one and I’m charging it now. I’ve read that it should take anywhere from 2-72 hours. What is the recommendation?
Hi, the home base should voltage should be around 4 volts, which is okay.
If you are recharging a new battery, we would suggest you to plug directly the charger into the robot. The whole charging cycle can last up to 72 hours when first using the battery.