Amazon.com: Synergy Digital Remote Control Battery, Compatible with Logitech F12440023 Replacement, (Li-Ion, 3.7V, 950 mAh) Ultra High Capacity Battery : Electronics
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Logitech Harmony One Battery (Blue Label) For Remote - Bulk : Amazon.ca: Electronics
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