Best Buy: Lenmar Lithium-Ion Battery for Select Logitech Universal Remotes RCZ301LO
foone🏳️⚧️ on Twitter: "but if I pull out the battery and measure it with my multimeter, it says very clearly that it has 3.7volts https://t.co/pTOGvaKC3M" / Twitter
For Logitech Harmony 915 1000 1100 1100i L-lu18 C-lr65 C-rl65 Squeezebox Duet Battery - Mobile Phone Batteries - AliExpress