javascript - convert mah to kwh

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                    // e.g. some power bank has:
const mAh = 20000;  //      20000 mAh capacity
const volts = 5.1;  //      5.1 V output

const kWh = (volts * mAh) / 1000000;

console.log(`${kWh} kWh`);  // 0.102 kWh

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const toKWh = (mAh, volts) => (volts * mAh) / 1000000;


// Usage example:
                    // e.g. some power bank has:
const mAh = 20000;  //      20000 mAh capacity
const volts = 5.1;  //      5.1 V output

const kWh = toKWh(mAh, volts);

console.log(`${kWh} kWh`);  // 0.102 kWh