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Amazon.com: ELEGOO AC 100V-240V Converter Adapter DC 9V 1A Power Supply US Plug 5.5mm x 2.5mm 1000mA Power Adapter Wall Charger Adapter Compatible with Arduino UNO MEGA with UL FCC CE Certificate :
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Amazon.com: ELEGOO AC 100V-240V Converter Adapter DC 9V 1A Power Supply US Plug 5.5mm x 2.5mm 1000mA Power Adapter Wall Charger Adapter Compatible with Arduino UNO MEGA with UL FCC CE Certificate :
Adafruit PowerBoost 500 Shield - Rechargeable 5V Power Shield : ID 2078 : $19.95 : Adafruit Industries, Unique & fun DIY electronics and kits