diff --git a/technic/helpers.lua b/technic/helpers.lua
index db38d0c..45fd2c9 100644
--- a/technic/helpers.lua
+++ b/technic/helpers.lua
@@ -71,7 +71,7 @@ function technic.refill_RE_charge(stack)
 	local max_charge = technic.power_tools[stack:get_name()]
 	if not max_charge then return stack end
 	local meta = technic.get_stack_meta_compat(stack)
-	meta:set_int("charge", max_charge)
+	meta:set_int("technic:charge", max_charge)
 	technic.set_RE_wear(stack, max_charge, max_charge)
 	return stack
 end
diff --git a/technic/legacy.lua b/technic/legacy.lua
index 457f459..f760e84 100644
--- a/technic/legacy.lua
+++ b/technic/legacy.lua
@@ -39,6 +39,13 @@ for i = 0, 64 do
 	minetest.register_alias("technic:lv_cable"..i, "technic:lv_cable")
 end
 
+-- Item meta
+
+-- Meta keys that have changed
+technic.legacy_meta_keys = {
+	["charge"] = "technic:charge",
+}
+
 -- Converts legacy itemstack metadata to itemstack meta and returns the ItemStackMetaRef
 function technic.get_stack_meta_compat(itemstack)
 	local meta = itemstack:get_meta()
@@ -48,7 +55,12 @@ function technic.get_stack_meta_compat(itemstack)
 		if metadata_table then
 			local table = meta:to_table()
 			for k, v in pairs(metadata_table) do
-				table.fields[k] = v
+				local legacy_key = technic.legacy_meta_keys[k]
+				if legacy_key then
+					table.fields[legacy_key] = v
+				else
+					table.fields[k] = v
+				end
 			end
 			meta:from_table(table)
 		end
diff --git a/technic/machines/register/battery_box.lua b/technic/machines/register/battery_box.lua
index c5275f0..ded8402 100644
--- a/technic/machines/register/battery_box.lua
+++ b/technic/machines/register/battery_box.lua
@@ -416,7 +416,7 @@ local function default_get_charge(itemstack)
 		return 0, 0
 	end
 	local item_meta = technic.get_stack_meta_compat(itemstack)
-	return item_meta:get_int("charge"), technic.power_tools[tool_name]
+	return item_meta:get_int("technic:charge"), technic.power_tools[tool_name]
 end
 
 local function default_set_charge(itemstack, charge)
@@ -425,7 +425,7 @@ local function default_set_charge(itemstack, charge)
 		technic.set_RE_wear(itemstack, charge, technic.power_tools[tool_name])
 	end
 	local item_meta = technic.get_stack_meta_compat(itemstack)
-	item_meta:set_int("charge", charge)
+	item_meta:set_int("technic:charge", charge)
 end
 
 function technic.charge_tools(meta, batt_charge, charge_step)
diff --git a/technic/tools/chainsaw.lua b/technic/tools/chainsaw.lua
index 90eee3a..ef1c263 100644
--- a/technic/tools/chainsaw.lua
+++ b/technic/tools/chainsaw.lua
@@ -314,7 +314,7 @@ minetest.register_tool("technic:chainsaw", {
 		end
 
 		local meta = technic.get_stack_meta_compat(itemstack)
-		local charge = meta:get_int("charge")
+		local charge = meta:get_int("technic:charge")
 
 		local name = user:get_player_name()
 		if minetest.is_protected(pointed_thing.under, name) then
@@ -330,7 +330,7 @@ minetest.register_tool("technic:chainsaw", {
 		cutter = {} -- Free RAM
 
 		if not technic.creative_mode then
-			meta:set_int("charge", charge)
+			meta:set_int("technic:charge", charge)
 			technic.set_RE_wear(itemstack, charge, chainsaw_max_charge)
 		end
 		return itemstack
diff --git a/technic/tools/flashlight.lua b/technic/tools/flashlight.lua
index b1953bb..9a47665 100644
--- a/technic/tools/flashlight.lua
+++ b/technic/tools/flashlight.lua
@@ -39,11 +39,11 @@ local function check_for_flashlight(player)
 	for i = 1, 8 do
 		if hotbar[i]:get_name() == "technic:flashlight" then
 			local meta = technic.get_stack_meta_compat(hotbar[i])
-			local charge = meta:get_int("charge")
+			local charge = meta:get_int("technic:charge")
 			if charge >= 2 then
 				if not technic.creative_mode then
 					charge = charge - 2;
-					meta:set_int("charge", charge)
+					meta:set_int("technic:charge", charge)
 					technic.set_RE_wear(hotbar[i], charge, flashlight_max_charge)
 					inv:set_stack("main", i, hotbar[i])
 				end
diff --git a/technic/tools/mining_drill.lua b/technic/tools/mining_drill.lua
index 141e6f8..3403af0 100644
--- a/technic/tools/mining_drill.lua
+++ b/technic/tools/mining_drill.lua
@@ -279,7 +279,7 @@ local function mining_drill_mkX_handler(itemstack, user, pointed_thing, drill_ty
 		return
 	end
 
-	local charge = meta:get_int("charge")
+	local charge = meta:get_int("technic:charge")
 	local mode = meta:contains("mode") and meta:get_int("mode") or 1
 
 	-- Check whether the tool has enough charge
@@ -292,7 +292,7 @@ local function mining_drill_mkX_handler(itemstack, user, pointed_thing, drill_ty
 	local pos = minetest.get_pointed_thing_position(pointed_thing, false)
 	drill_dig_it(pos, user, mode)
 	if not technic.creative_mode then
-		meta:set_int("charge", charge)
+		meta:set_int("technic:charge", charge)
 		technic.set_RE_wear(itemstack, charge, max_charge[drill_type])
 	end
 	return itemstack
diff --git a/technic/tools/mining_lasers.lua b/technic/tools/mining_lasers.lua
index 760f378..aea8d50 100644
--- a/technic/tools/mining_lasers.lua
+++ b/technic/tools/mining_lasers.lua
@@ -102,7 +102,7 @@ for _, m in pairs(mining_lasers_list) do
 		on_refill = technic.refill_RE_charge,
 		on_use = function(itemstack, user)
 			local meta = technic.get_stack_meta_compat(itemstack)
-			local charge = meta:get_int("charge")
+			local charge = meta:get_int("technic:charge")
 			if charge == 0 then
 				return
 			end
@@ -119,7 +119,7 @@ for _, m in pairs(mining_lasers_list) do
 				"technic_laser_mk" .. m[1])
 			if not technic.creative_mode then
 				charge = math.max(charge - m[4], 0)
-				meta:set_int("charge", charge)
+				meta:set_int("technic:charge", charge)
 				technic.set_RE_wear(itemstack, charge, m[3])
 			end
 			return itemstack
diff --git a/technic/tools/prospector.lua b/technic/tools/prospector.lua
index f3352b2..2f4019d 100644
--- a/technic/tools/prospector.lua
+++ b/technic/tools/prospector.lua
@@ -7,7 +7,7 @@ local function meta_to_table(meta)
 	local t = {}
 	local mt = meta:to_table()
 
-	t.charge = tonumber(mt.fields.charge) or 0
+	t.charge = tonumber(mt.fields["technic:charge"]) or 0
 	t.target = mt.fields.target or ""
 	t.look_depth = tonumber(mt.fields.look_depth) or 7
 	t.look_radius = tonumber(mt.fields.look_radius) or 1
@@ -33,7 +33,7 @@ minetest.register_tool("technic:prospector", {
 		end
 		if not technic.creative_mode then
 			toolmeta.charge = toolmeta.charge - charge_to_take
-			meta:set_int("charge", toolmeta.charge)
+			meta:set_int("technic:charge", toolmeta.charge)
 			technic.set_RE_wear(toolstack, toolmeta.charge, technic.power_tools[toolstack:get_name()])
 		end
 		-- What in the heaven's name is this evil sorcery ?
diff --git a/technic/tools/sonic_screwdriver.lua b/technic/tools/sonic_screwdriver.lua
index 4a9b17b..1778a79 100644
--- a/technic/tools/sonic_screwdriver.lua
+++ b/technic/tools/sonic_screwdriver.lua
@@ -42,7 +42,7 @@ local function screwdriver_handler(itemstack, user, pointed_thing, mode)
 	-- this is consistent with the previous sonic screwdriver
 
 	local meta = technic.get_stack_meta_compat(itemstack)
-	local charge = meta:get_int("charge")
+	local charge = meta:get_int("technic:charge")
 	if charge < 100 then
 		return
 	end
@@ -66,7 +66,7 @@ local function screwdriver_handler(itemstack, user, pointed_thing, mode)
 
 	if not technic.creative_mode then
 		charge = charge - 100
-		meta:set_int("charge", charge)
+		meta:set_int("technic:charge", charge)
 		technic.set_RE_wear(itemstack, charge, sonic_screwdriver_max_charge)
 	end
 
diff --git a/technic/tools/vacuum.lua b/technic/tools/vacuum.lua
index 45c810b..3d97150 100644
--- a/technic/tools/vacuum.lua
+++ b/technic/tools/vacuum.lua
@@ -15,7 +15,7 @@ minetest.register_tool("technic:vacuum", {
 	on_refill = technic.refill_RE_charge,
 	on_use = function(itemstack, user, pointed_thing)
 		local meta = technic.get_stack_meta_compat(itemstack)
-		local charge = meta:get_int("charge")
+		local charge = meta:get_int("technic:charge")
 		if charge < vacuum_charge_per_object then
 			return
 		end
@@ -44,7 +44,7 @@ minetest.register_tool("technic:vacuum", {
 			end
 		end
 
-		meta:set_int("charge", charge)
+		meta:set_int("technic:charge", charge)
 		technic.set_RE_wear(itemstack, charge, vacuum_max_charge)
 		return itemstack
 	end,