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Amazon.com: Replacement for Logitech F12440056 Battery - Compatible with Logitech Universal Remote L-LU18 Battery (1250mAh, 3.7V, Lithium-Ion) : Electronics
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Logitech Harmony One Battery - Replacement for Logitech Universal Remote R-IG7 Battery (950mAh, 3.7V, Lithium-Ion) - Walmart.com
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