Audiovox BTR-1100 Battery by Amstron is designed for use with Audiovox CDM-130 / CDM-130XL / CDM-135XL / PCX-1100XL / PCX-1110XL / CDM-8100/ CDM-8100PP/ CDM-8150/ CDM-8150X cell phone models. Amstron cell phone batteries are precision-engineered and rigorously tested for voltage, capacity, compatibility, and safety to exceed original equipment manufacturer specifications.