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Geekworm Raspberry Pi 4B/3B+/3B X715 V1.0 Power Management & PWM Cooling Board with Wide Voltage Input (6V~60V) for Raspberry Pi 4 Model B/Pi 3B+/3B/3A+ : Amazon.in: Computers & Accessories
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pi 3b+ - Raspberry Pi 3B+ PMIC Replacement, 1V8 available for a while then no voltage again - Raspberry Pi Stack Exchange
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