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Commit 9238b612 authored by Ying Wai (Daniel) Fan's avatar Ying Wai (Daniel) Fan
Browse files

Correct the formula of battery capacity estimation. 

Instead of
  (current charge) * (current battery level percentage)
the formula should be
  (current charge) / (current battery level percentage)
to estimate the charge at 100% battery level.

Bug: 34255953
Fixes: 34255953
Test: formula change CL. No existing unit tests found.
Change-Id: I56ef7af3fb097a3082e0ef24329f522d2a0229cc
parent 5256e055

core/java/com/android/internal/os/BatteryStatsImpl.java

+1 −1
Original line number Diff line number Diff line
@@ -9713,7 +9713,7 @@ public class BatteryStatsImpl extends BatteryStats { 
                resetAllStatsLocked();

                if (chargeUAh > 0) {

                    // Only use the reported coulomb charge value if it is supported and reported.

                    mEstimatedBatteryCapacity = (int) ((level / 100.0) * (chargeUAh / 1000));

                    mEstimatedBatteryCapacity = (int) ((chargeUAh / 1000) / (level / 100.0));

                }

                mDischargeStartLevel = level;

                reset = true;