2 ms·
> Do you degrade screen-on time but leave performance relatively unchanged? I don't think Screen on Time is the concern (though I admit that article isn't extr
by mastax 9y ago
> Do you degrade screen-on time but leave performance relatively unchanged?
I don't think Screen on Time is the concern (though I admit that article isn't extremely clear). Given that devices were shutting down at 40% capacity I think it was more of a brown-out condition, where the device shut down despite having more energy left in the battery.
Given:
1. Battery voltage decreases as charge decreases.
2. Battery voltage sags as current draw increases, due to internal resistance.
3. Internal resistance increases with battery wear.
4. If battery voltage drops too low the phone will turn off.
a moment of high current draw could cause a device to suddenly shut down. Since this issue was endemic to 6S devices, perhaps some unusually large number of those batteries had unusually high internal resistance due to wear.
If this were the case the fix would be to reduce peak power draw and thus peak performance. This change would be especially evident in geekbench, but could also affect regular usage since mobile devices typically try to alternate (sleep) -> (high performance) -> (sleep).