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How many LEDs can a 9V battery power if they are all connected in a parallel circuit? Is it necessary to use a resistance for such a circuit. If so, what should
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ninevolts / LED calculator
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Forward Voltage and KVL | All About LEDs | Adafruit Learning System
Is it possible to get a 9v battery to power an LED for a long time? - Quora
Amazon.com: 9V Rechargeable Batteries, 1300mAh 9 Volt Lithium Batteries USB-C Charge with 2 in 1 Charging Cable for Microphone, Smoke Detector, Electronic Toys, LED Lighting Devices, walkie-Talkie etc (2 Pack) : Health
