Garmin Astro 430 Compatibility: This rechargeable battery pack is exclusively designed for the Garmin Astro 430 handheld device Convenience and Longevity: This rechargeable battery pack offers a more convenient and long-lasting solution compared to traditional AA batteries Charging Method: The NiMH battery within the pack can be charged using your compatible outdoor handheld device Easy Recharging: Simply charge your device using an AC adapter or USB cable on your computer to fully recharge the battery pack for extended use This rechargeable battery pack is designed exclusively for the Garmin Astro 430 Handheld. It offers a long-lasting, convenient alternative to traditional AA batteries. The NiMH battery can be easily recharged via your compatible outdoor handheld device, using either an AC adapter or a USB cable connected to your computer, ensuring extended use.