AA battery charger with (4) 3000mah Super High Capacity Nimh batteries. These are the highest capacity Nimh. batteries on the market. These work great in a Garmin Astro 220 or 320 and will over time save 100's of dollars over buying disposable batteries. Keep a set of two in standby, while running one set in unit. Batteries also work great in digital tracking receivers such as the Mt-8000, Yaesu VR-500 or Icom R-10.