H500-N - N Size 500mAh Industrial Grade NiMH Cylindrical Battery
KA7OEI's blog: A microcontroller-based A/B Battery replacement for the Zenith TransOceanic H-500 radio, with filament regulation
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Amazon.com: Kircuit AC/DC Adapter Compatible with Ruckus ZoneFlex H500 Series 901-H500-US00 Multiservice Dual Band Concurrent 2 Stream Wired/Wireless Wall Switch Access Point AP Power Supply Battery Charger : Electronics