Free Battery Cat Toy Nov 15, 2018 20:06:28 GMT Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by kioskfan on Nov 15, 2018 20:06:28 GMT Here's the latest thing I've made, it's a laser pointer diode, potentiometer, switch and a used battery from our smoke detectors and costs around a dollar to make.