AC adapter conversion for Nature’s Touch Cradle Swing is now done. I hated using and wasting all those D batteries!
Here are the parts I used:
I tested the terminals to find where the swing was expecting positive and negative energy (the batteries are in series, so there are only 2 ways this might work) and clamped the alligator clips to those terminals (you can pry the metal lip out just a tiny bit, which gives you a secure place to clamp the clips). I also used 2 x 4mm male banana plugs, which fit right into the alligator clips, although soldering them directly would probably have been fine.
Using these parts, it is also possible to make this integrated, giving the battery cover a female 2.1 x 5.5mm receptacle for the AC adapter to plug into, but I didn’t have the energy.
Next, I will probably take the pigtail apart and solder in an extension. The AC adapter currently will reach a plug that is near the swing, but it would be more useful if it were just a bit longer.
If you are in the market for a swing, we purchased the Fisher-Price Snugabunny Cradle ‘N Swing for my parents’ house. It is $125, and features both battery and AC adapter operation. The existing cradle swing we have in our place was a hand-me-down from good friends.