I'm confused by this as well. The reason it is recommended to charge your phone in fewer long bursts is due to the fact that li-ion batteries have a finite amount of charge cycles before it won't hold a charge and decreases in longevity over time up to that point. One full charge is one charge cycle. A 10% charge is 0.1 of a charge cycle. If you constantly charge your phone back up when it hits the 90% point you will have more charges per day than if you had waited until the battery was down to about 20% and thus a 80% charge - 0.8 charge cycle. Depending on usage one could easily charge more than 8 times in a day at the 10% rate, which means they are using more charge cycles of their battery resulting in a shorter life.
I'm confused by this as well. The reason it is recommended to charge your phone in fewer long bursts is due to the fact that li-ion batteries have a finite amount of charge cycles before it won't hold a charge and decreases in longevity over time up to that point. One full charge is one charge cycle. A 10% charge is 0.1 of a charge cycle. If you constantly charge your phone back up when it hits the 90% point you will have more charges per day than if you had waited until the battery was down to about 20% and thus a 80% charge - 0.8 charge cycle. Depending on usage one could easily charge more than 8 times in a day at the 10% rate, which means they are using more charge cycles of their battery resulting in a shorter life.