iRobot Roomba i7+ and Combo j7 review: 60 days of vacuum testing
User manual iRobot Roomba i7+ (English - 19 pages)
Gadget Guts: iRobot Roomba 880
iRobot Roomba i7 Plus Caster Wheel Replacement - iFixit Repair Guide
How to Disassemble the iRobot Roomba i-Series models
Replace a 4000 mAh battery pack compatible with i7, i7+, e6, e5 model Roomba vacuum cleaners. 14.4 Volts (V). 57.6 Watt Hours (Wh).
iRobot Roomba i7, i7+, e5, e6 Battery: Replacement Part
iRobot Roomba i7 Plus Roller Brush Replacement - iFixit Repair Guide
iRobot Roomba i7 Plus Battery Replacement - iFixit Repair Guide
Roomba Repair - iFixit