Why do we refer to phone battery capacity in mAh but EVs in kWh?
In: 1
Power (watts) = voltage (v) * current (amps)
Multiple both sides by hours to get power over time.
Phone batteries are fixed voltage and refers to how many amps-hours it can deliver in total. Multiply by 3.8 (typical voltage of phone battery) or the voltage of the battery to get kWh.
Where as cars batteries can support various voltages. So you just rate the total capacity as kwh since some of the car might use 12v, some might use 5v, some might use 120v. Theres no way to know the total capacity if you used amp-hours.
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