Logitech G502 LIGHTSPEED vs Logitech G502 X Side-by-Side Mouse Comparison - RTINGS.com
An actual review of the G502 : r/MouseReview
Amazon.com: Logitech G Powerplay Wireless Charging System for G502 Lightspeed, G703, G903 Lightspeed and PRO Wireless Gaming Mice, Cloth or Hard Mouse Pad - Black : Video Games