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Mouse Battery 3.7V/450mAh 533-000120 for Logitech MX Master,Anywhere 2 ,M-RO052,MX Master 2,Master 3,Master 2s,MX ERGO - AliExpress
User manual Logitech MX Anywhere 2S (English - 4 pages)
Amazon.com: Logitech MX Anywhere 2 Wireless Mobile Mouse, Long Range Wireless Mouse with Hyper Scroll and Easy-Switch up to 3 Devices – Stone : Electronics