If you had a battery rated as 100 mAmp-hr, and it was in a circuit that had a current of 50 mAmps, how long would you expect the battery to last?
2006-10-01 13:49:22 · 4 answers · asked by Meder 2 in Science & Mathematics ➔ Physics
Amp-Hour or AH is a unit for battery capacity where amperage of the drain and the hours of capacity was multiplied together.
Therefore, if you have 10AH of battery, by drawing 2 amps, it will last 5 hours, and by draing 5 amps, it will last two hours.
So, IN THEORY, if you have 100mAH battery connected to 50mA load, it will last two hours. Bear in mind, the reality is usually less than the theory. In reality, you have 1 to 1.5 hours of USABLE power in your battery.
Keep in mind, as the battery drain, the internal resistance will raise and as a result, the voltage at the terminal will be lower for the last half of the battery life.
2006-10-01 14:10:08 · answer #1 · answered by tkquestion 7 · 0⤊ 0⤋
Maybe an hour (with rapidly diminishing voltage, depending on the type of battery), since the current drawn is a high percent of the total capacity.
2006-10-01 20:54:37 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Hi. C'mon, divide 100 by 50.
2006-10-01 20:52:17 · answer #3 · answered by Cirric 7 · 0⤊ 1⤋
2 hours.
2006-10-01 20:54:33 · answer #4 · answered by entropy 3 · 0⤊ 1⤋