Amazon.com: Cordless Robotic Pool Cleaner, Automatic Pool Vacuum with 60-90 Mins Working Time, Rechargeable Battery, IPX8 Waterproof for Above/In-Ground Swimming Pools Up to 861 Sq Ft : Everything Else
Amazon.com: Robot Vacuum Replacement Battery Pack - Replacement Rechargeable Battery for Pure Clean PUCRC660 Smart Robot Vacuum Cleaner - Pure Clean PRTPUCRC6608 : Industrial & Scientific
Batteries and Charging | Student Robotics
Biomorphic Batteries Could Provide 72 Times More Energy for Robots - Tech Briefs