diff --git a/base/power_monitor/power_monitor_device_source_stub.cc b/base/power_monitor/power_monitor_device_source_stub.cc
index 96a9ffdc5a86fc..8aeadc979e3cf2 100644
--- a/base/power_monitor/power_monitor_device_source_stub.cc
+++ b/base/power_monitor/power_monitor_device_source_stub.cc
@@ -8,7 +8,6 @@
 namespace base {
 
 bool PowerMonitorDeviceSource::IsOnBatteryPower() {
-  NOTIMPLEMENTED();
   return false;
 }
 
diff --git a/base/power_monitor/power_monitor_source.h b/base/power_monitor/power_monitor_source.h
index 891dcb6b2aa6cb..40f6e5c7b49850 100644
--- a/base/power_monitor/power_monitor_source.h
+++ b/base/power_monitor/power_monitor_source.h
@@ -36,8 +36,8 @@ class BASE_EXPORT PowerMonitorSource {
 
   // Reads the initial operating system CPU speed limit, if available on the
   // platform. Otherwise returns PowerThermalObserver::kSpeedLimitMax.
-  // Only called on the main thead in PowerMonitor::Initialize().
-  // The actual speed limit value will be updated asynchronosulsy via the
+  // Only called on the main thread in PowerMonitor::Initialize().
+  // The actual speed limit value will be updated asynchronously via the
   // ProcessSpeedLimitEvent() if/when the value changes.
   virtual int GetInitialSpeedLimit();