What type and how many batteries does the Duetconnect Deluxe swing require?
The swing requires four D (LR20) batteries. Alkaline disposable batteries are recommended, and you should never mix battery types. The swing will not run if the batteries are put in backwards, so check the positive and negative terminals carefully. (Page 25)
From the official Graco Duetconnect Deluxe manual, page 25
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