Insert the Amp hours (Ah), voltage (V) and time in hours (h) below and click on Calculate to obtain Watts (W).
The formula is (Ah)*(V)/(h) = (W).
For example, if you have a 2 Ah battery rated at 5 Volts that lasts for 2 hours, the wattage is 2Ah * 5V / 2h = 5W.
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