According to can a 3000mAh portable charger charge a 1500mAh battery?, it was mentioned that a 3000mAh Portable charger can only charge a 1500mAh phone's battery 1.33334 times.
So, how do we determine the total number of charges that a Portable charger can supply to a battery given the following parameters:
XmAh Portable charger with output of
PmAh phone battery with input of 5 volt (almost all phone is using 5 volts due to USB Charging) and
The reason for asking is that according to the article, it mention that there is a 20% inefficiency (which I do not know if it is true for most portable charger), so a 3000 mAh Portable Battery charger can only charge a 2400 mAh battery.
If that is the case, the 3000 mAH Portable Battery charger can charge the 1500 mAh battery 1.6 times instead of 1.33334 times. I was thinking why it was stated 1.33334 times and not 1.6 times and I believe that there must be a way to calculate the number of times a Portable charger can charge a phone battery until it have no more electrical charges.
Also, according to a user, it mention the following:
As posted above, with voltage conversion there is just 80% capacity of portable charger's battery pack available for your phone.
While charging, your phone needs power for stand-by, so in my experience, you'll have just 65% capacity.
And by industrial standards for batteries is +/- 20% tolerance admitted with capacity.
So, your portable charger might have just 45% of its 3000mAh available for to charge your phone.
So, can one use the magical value
45% as a gauge for portable battery charger? (Meaning that a 5000 mAh battery charger can only charge a 2250 mAh phone battery one time.)