diff --git a/machines/canning_machine.lua b/machines/canning_machine.lua
index 03c4f32..93a3a6c 100644
--- a/machines/canning_machine.lua
+++ b/machines/canning_machine.lua
@@ -85,15 +85,7 @@ canningMachine.onTimer=function(pos,elapsed,meta,inv)
 	local powerStorageSlot=inv:get_stack("powerStorage",1)
 	local targetMeta=targetSlot:get_meta()
 
-	if not powerStorageSlot:is_empty() then
-		local stackMeta=powerStorageSlot:get_meta()
-		if industrialtest.api.transferPower(stackMeta,meta,stackMeta:get_int("industrialtest.powerFlow"))>0 then
-			shouldUpdateFormspec=true
-			shouldRerunTimer=true
-			industrialtest.api.updateItemPowerText(powerStorageSlot)
-			inv:set_stack("powerStorage",1,powerStorageSlot)
-		end
-	end
+	shouldRerunTimer,shouldUpdateFormspec=industrialtest.internal.chargeFromPowerStorageItem(meta,inv)
 
 	local def=fuelSlot:get_definition()
 	if not fuelSlot:is_empty() and not targetSlot:is_empty() and meta:get_int("industrialtest.powerAmount")>=canningMachine.opPower and (not def._industrialtest_emptyVariant or leftoverSlot:item_fits(ItemStack(def._industrialtest_emptyVariant))) and
@@ -170,14 +162,7 @@ canningMachine.activeOnTimer=function(pos,elapsed,meta,inv)
 	local targetSlot=inv:get_stack("target",1)
 	local powerStorageSlot=inv:get_stack("powerStorage",1)
 
-	if not powerStorageSlot:is_empty() then
-		local stackMeta=powerStorageSlot:get_meta()
-		if industrialtest.api.transferPower(stackMeta,meta,stackMeta:get_int("industrialtest.powerFlow"))>0 then
-			shouldUpdateFormspec=true
-			industrialtest.api.updateItemPowerText(powerStorageSlot)
-			inv:set_stack("powerStorage",1,powerStorageSlot)
-		end
-	end
+	shouldRerunTimer,shouldUpdateFormspec=industrialtest.internal.chargeFromPowerStorageItem(meta,inv)
 
 	if fuelSlot:is_empty() or targetSlot:is_empty() or meta:get_int("industrialtest.powerAmount")<canningMachine.opPower then
 		if meta:get_int("industrialtest.powerAmount")>=canningMachine.opPower then
diff --git a/machines/common.lua b/machines/common.lua
index 31cd2d3..1b77888 100644
--- a/machines/common.lua
+++ b/machines/common.lua
@@ -49,6 +49,22 @@ industrialtest.internal.allowMoveToUpgradeSlot=function(pos,toIndex,stack)
 	return stack:get_count()
 end
 
+industrialtest.internal.chargeFromPowerStorageItem=function(meta,inv)
+	local shouldRerunTimer=false
+	local shouldUpdateFormspec=false
+	local powerStorageSlot=inv:get_stack("powerStorage",1)
+	if not powerStorageSlot:is_empty() then
+		local stackMeta=powerStorageSlot:get_meta()
+		if industrialtest.api.transferPower(stackMeta,meta,stackMeta:get_int("industrialtest.powerFlow"))>0 then
+			shouldUpdateFormspec=true
+			shouldRerunTimer=stackMeta:get_int("industrialtest.powerAmount")>0 and not industrialtest.api.isFullyCharged(meta)
+			industrialtest.api.updateItemPowerText(powerStorageSlot)
+			inv:set_stack("powerStorage",1,powerStorageSlot)
+		end
+	end
+	return shouldRerunTimer,shouldUpdateFormspec
+end
+
 machine.getFormspec=function(pos,config)
 	local formspec
 	if industrialtest.mtgAvailable then
@@ -561,15 +577,9 @@ simpleElectricItemProcessor.onTimer=function(pos,elapsed,meta,inv,config)
 	local shouldUpdateFormspec=false
 	local shouldRerunTimer=false
 	local requiredPower=elapsed*config.opPower*industrialtest.api.getMachineSpeed(meta)
-	if powerStorageSlot:get_count()>0 then
-		local stackMeta=powerStorageSlot:get_meta()
-		if industrialtest.api.transferPower(stackMeta,meta,stackMeta:get_int("industrialtest.powerFlow"))>0 then
-			shouldUpdateFormspec=true
-			shouldRerunTimer=true
-			industrialtest.api.updateItemPowerText(powerStorageSlot)
-			inv:set_stack("powerStorage",1,powerStorageSlot)
-		end
-	end
+
+	shouldRerunTimer,shouldUpdateFormspec=industrialtest.internal.chargeFromPowerStorageItem(meta,inv)
+
 	if srcSlot:get_count()>0 and meta:get_int("industrialtest.powerAmount")>=requiredPower then
 		local output=craftResultProxy(config.method,srcSlot)
 		if output.time>0 and inv:room_for_item("dst",output.item) then
@@ -658,15 +668,8 @@ simpleElectricItemProcessor.activeOnTimer=function(pos,elapsed,meta,inv,config)
 	local shouldRerunTimer=false
 	local requiredPower=elapsed*config.opPower*industrialtest.api.getMachineSpeed(meta)
 
-	if powerStorageSlot:get_count()>0 then
-		local stackMeta=powerStorageSlot:get_meta()
-		if industrialtest.api.transferPower(stackMeta,meta,stackMeta:get_int("industrialtest.powerFlow"))>0 then
-			shouldUpdateFormspec=true
-			shouldRerunTimer=true
-			industrialtest.api.updateItemPowerText(powerStorageSlot)
-			inv:set_stack("powerStorage",1,powerStorageSlot)
-		end
-	end
+	shouldRerunTimer,shouldUpdateFormspec=industrialtest.internal.chargeFromPowerStorageItem(meta,inv)
+
 	if srcSlot:get_count()>0 and meta:get_float("maxSrcTime")<=0 and meta:get_int("industrialtest.powerAmount")>=requiredPower then
 		local output=craftResultProxy(config.method,srcSlot)
 		if output.time>0 and inv:room_for_item("dst",output.item) then