I agree with KK5F and A3BAP on removing the KBT1 from the K1. I removed mine after several months of use due to the inconvenience of removing and reinstalling the batteries for charging. But it was convenient for grabbing the T1 for brief operating on the back deck. I saved the KBT1 parts and anyone can have them for $5 plus shipping. 73 ... Dave, K8AX K1 S/N 757