I tried using the robot vacuum cleaner "Rumba 630" of the 40,000 yen range at home Report - GIGAZINE
X2PLKB2 Nastima Upgrade 14.8V 5000mAh Lithium ion Battery for iRobot Roomba 900 800 700 600 Series 985 980 960 895 891 890 880 870 860
14.4V 6000mAh Vacuum Cleaner Li ion Battery for iRobot Roomba 980 960 R3 890 880 870 650 630 580 560; 500 600 700 800 900 Series|Replacement Batteries| - AliExpress
Sparkole 5300mAh 14.8V Li ion Battery for iRobot Roomba 500 600 700 800 900 Series 550 560 580 620 630 650 770 780 870 880 980|battery for irobot| battery for irobot roombabattery for vacuum cleaner - AliExpress
iRobot® XLife™ Extended Life Battery
iRobot Roomba 630 Battery
China IRobot Roomba 500 600&700 Series 14.4V 4400Ah Mica iRobot Battery Lithium Ion Battery on Global Sources,lithium ion cell,batteries cell,LiFePO4 Battery cell
Battery for iRobot Roomba 630 Vacuum
Synergy Digital Vacuum Cleaner Battery, Works with iRobot Roomba 630 Vacuum Cleaner, (Ni-MH, 14.4V, 4000 mAh) Ultra High Capacity Battery - Walmart.com