[Re-posting from Elecraft-KX at groups.io] Please contact me off-list if you'd be interested in an internal charger for the KX2's existing battery pack (KXBT2 -- 3x 18650 Li-Ion). This charger would install in the same place as the KXIO2 option, and would still include the same real-time-clock features. Thanks, Wayne N6KR