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5V 1800 mAh Polymer Ni-mh Rechargeable 4 AA Cell Battery Pack with 5.5mm DC Jack Adaptor Port for Arduino UNO Toy Car DIY Project
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Amazon.com: ALAMSCN Electronic Practice Kit DC 3V-5V Metal Detector DIY Kit Sensor Module Assemble with Buzzer Battery Holder for Arduino Beginners : Electronics
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Can I use the same ground for my 5V battery and Arduino like this: - General Electronics - Arduino Forum
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