Amazon.com: Logitech G502 Lightspeed Wireless Gaming Mouse, 25K Hero Gaming Sensor, 25600 DPI, RGB, Ultra-Light, 11 Programmable Buttons, Long Life Battery, PowerPlay-Compatible, PC - Black : Video Games
Synergy Digital Keyboard Battery, Compatible with Logitech G502 Keyboard, (Li-Pol, 3.7V, 180mAh) Ultra High Capacity, Replacement for Logitech 533-000151 Battery
USPS Genuine 240mAh Battery 533-000151 For Logitech G PRO / G502/G502 Hero Mouse | eBay