Amazon.com: NASTIMA 14.8V 5000mAh Lithium ion Replacement Battery Compatible with iRobot Roomba 960/895/890/860/695/680/690/675/640/614, Replace The Original 1800mAh Lithium ion Battery : Home & Kitchen
Turns out your roomba can do a wireless site survey. This is pre and post AP upgrade/relocation. : r/HomeNetworking
iRobot Roomba 980: $550 for a high-end robot vacuum - CNET
OEM iRobot Roomba 890 891 895 or 980 960 Black Bumper with IR sensor | eBay