diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/item/QuantumBatteryItem.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/item/QuantumBatteryItem.kt
index c25b015ed..44ebdfdf4 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/item/QuantumBatteryItem.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/item/QuantumBatteryItem.kt
@@ -107,7 +107,11 @@ class QuantumBatteryItem : Item {
 				return howMuch
 			}
 
-			val newEnergy = (delegate.value + howMuch.coerceAtMost(throughput!!)).coerceAtMost(capacity!!)
+			if (delegate.value >= capacity!!) {
+				return ImpreciseFraction.ZERO
+			}
+
+			val newEnergy = (delegate.value + howMuch.coerceAtMost(throughput!!)).coerceAtMost(capacity)
 			val diff = newEnergy - delegate.value
 
 			if (!simulate) {