This alkaline battery case can replace any rechargeable battery pack for the VXA-150 Aviator, the VXA-210 Pilot, VXA-220 or the VXA-300 transceivers. This is a must for any pilot using either of these transceivers as a back up. Too often we forget to recharge our transceivers, ordinary alkaline batteries can be stored in a flight bag for ages, until the day you need them. Great for that extra peace of mind!