IRobot 780 charging problem

• Problem
  • The Irobot showed Error 5 on it’s display.
  • After measuring the AC adapter, it showed about 22Vdc.
  • The faulty battery show 15.6v after charging the robot.
  • I bought new battery at AliExpress from HERE. It was a battery of 3500mA. The original battery showed mark of 4500mA.
• Solution
  • After that I took an Irobot from friend and used his battery, 4500mA new battery, and the faulty Irobot worked OK.

• Irobot.com – Original parts
• AliExpress or Ebay
• Protechrobotics
• Top 3 batteries for IRobot

Videos:

• General Cleaning
• Charging Error 5

• Robot was not connected to charger for a month.
• Due to that, after connecting it to charger, it didn’t work.
• What I did is to take the battery and charge it with external power supply for 30 min, as described at the following picture:
  • 
• After that connect the battery to the Robot and continue to charge with the robot charger.