I get that, for a house/solar battery, it sort of makes sense as your typical energy usage would be measured in kWh on your bills. For the smaller devices, though, the chargers are usually rated in watts (especially if it’s USB-C), so why are the batteries specified in amp hours by the manufacturers?
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mA is a measure of charge, or approximately how long a battery can last.
kW is a measure of power, or how much energy the battery provides.
The phone industry has pushed the agenda more mAh is better, but this isn’t necessarily true.
There are more factors to consider when purchasing a phone, and energy should be a huge factor.
If the phone can’t store more energy (bigger battery, better power management), all the mAh won’t matter as the phone will drain quickly.
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