diff --git a/sim/components/battery/BatteryController.h b/sim/components/battery/BatteryController.h
index d07243d..61d10f3 100644
--- a/sim/components/battery/BatteryController.h
+++ b/sim/components/battery/BatteryController.h
@@ -22,7 +22,7 @@ namespace Pinetime {
       }
 
       bool BatteryIsLow() const {
-        return false;
+        return percentRemaining <= lowBatteryThreshold;
       }
 
       bool IsCharging() const {
@@ -53,6 +53,8 @@ namespace Pinetime {
       //void SaadcEventHandler(nrfx_saadc_evt_t const* p_event);
       //static void AdcCallbackStatic(nrfx_saadc_evt_t const* event);
 
+      static constexpr uint8_t lowBatteryThreshold {20};
+
       bool isReading = false;
 
       Pinetime::System::SystemTask* systemTask = nullptr;