The lights we use are all brand new and put on your heart/star whilst switched on. This makes sure they’re working and also to make sure they’re placed correctly.
During posting, sometimes they can slip under the wool. You can easily move them so they’re exposed again.
I cannot give any guarantees as to how long the batteries will last as it depends how long you leave them switched on for. I would recommend switching them off at night when you go to bed. Replacement batteries can be bought here in our homeware and gift collection.
To change your batteries they need to go in a certain way. Look at how they are before taking the old ones out. Below is a simple picture of how most of them will be.