The Kenwood KNB-45L is a 2000 mAh Lithium Ion Battery designed to fit a number of Kenwood ProTalk and NX Series two way radios. You can expect up to 17 hours of talk time between charges with the Kenwood KNB-45L. The KNB-45L fits a number of Kenwood two way radios including Kenwood TK-2000 Series, Kenwood TK-3000 Series, and Kenwood NX-P1000 series two way radios.