Any toy that stimulates your special spots tends to have batteries. For instance, vibrators and some prostate massagers need batteries. Keep in mind, if you use oldbatteries, you're not going to get as much pleasure out of your toys as you could. The newer the batteries; the more power the toys have. That's why we offer a selection of batteries. We want you to purchase everything you need at one time, so you can enjoy your adult toys as soon as they arrive at your door.