Momoiro Clover Z penlight, white color, uses 6 LR44 batteries. - Model Name: Momoiro Clover Z Penlight There is blue rust on the battery compartment. I tried replacing the batteries, but it doesn't light up. It was expensive when I bought it, so I would like to give it to someone who can repair it. This is the pink version for Aarin. Thank you for looking.