Watt Hours

Markove

Registered User
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Hello. How do I calculate the watt hours per cell or watt rating figure for a lithium-ion 5000 mAh smartphone battery? I don't know the voltage figure. Thanks.
 
You need to know the voltage.
Formula is (mAh)*(V)/1000 = (Wh). For example, if you have a 300mAh battery rated at 5V, the power is 300mAh * 5V / 1000 = 1.5Wh.
 
You need to know the voltage.
Thanks. I'm having difficulty getting that particular piece of information. I'm guessing 11-12v.
 
Yeah, lithium cells have a nominal voltage in the region of 3.7V, but can reach up to 4.2 or higher fully charged with no load.
 
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