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Battery Energy and Runtime Calculator • Electrical, RF and Electronics Calculators • Online Unit Converters
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Battery Energy and Runtime Calculator • Electrical, RF and Electronics Calculators • Online Unit Converters
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Amazon.com: PKCELL 9 Volt Batteries- 9V Battery 2 Pack for Smoke Detectors and Carbon Zinc Monoxide Detector (2 Counts) : Health & Household
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Amazon.com: EBL 4 Pack 9V Lithium Batteries 1200mAh, Non Rechargeable 9V Batteries - High Performance 9 Volt Lithium Metal Battery Longer Lasting Constant Volt for Smoke Alarm Detector : Health & Household
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Battery Energy and Runtime Calculator • Electrical, RF and Electronics Calculators • Online Unit Converters
![Why is the ampmeter saying 10 mA? The battery is 9V and the resistor is 500 ohms. When I calculate the current the formula (I = V/R), I don't get that value. : Why is the ampmeter saying 10 mA? The battery is 9V and the resistor is 500 ohms. When I calculate the current the formula (I = V/R), I don't get that value. :](https://preview.redd.it/9vntzxtj78o91.jpg?auto=webp&s=8604c7ae96a162880a20474da5fa0f8fff68ed69)
Why is the ampmeter saying 10 mA? The battery is 9V and the resistor is 500 ohms. When I calculate the current the formula (I = V/R), I don't get that value. :
![led - How to calculate how long a 9V battery will last based on schematic? - Electrical Engineering Stack Exchange led - How to calculate how long a 9V battery will last based on schematic? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/pguw5.png)