Lulla doll by RoRo - What kind of batteries does Lulla use? The sound unit uses two AA batteries. You can use either alkaline or rechargeable batteries. Do not use Lithium batteries.
Lulla Doll Review - Baby Hints and Tips
Amazon.com : Lulla Sky - Lulla doll by RoRo - Awarded Baby Sleep Aid and Soother - 12 Hour Natural Heartbeat and Breathing Sound Machine - Washable - Crib Attachment from Birth and Beyond : Baby