diff --git a/icta_controller/battery.lua b/icta_controller/battery.lua
index 7d3f262..de7f328 100644
--- a/icta_controller/battery.lua
+++ b/icta_controller/battery.lua
@@ -24,8 +24,9 @@ end
 
 local function on_timer(pos, elapsed)
 	local meta = minetest.get_meta(pos)
+	local number = meta:get_string("node_number")
 	local percent = calc_percent(meta:get_int("content"))
-	meta:set_string("infotext", S("Battery").." ("..percent.."%)")
+	meta:set_string("infotext", S("Battery").." "..number..": "..percent.." %")
 	if percent == 0 then
 		local node = minetest.get_node(pos)
 		node.name = "techage:ta4_battery_empty"
@@ -75,10 +76,16 @@ minetest.register_node("techage:ta4_battery", {
 			end
 		end
 		M(pos):set_int("content", content)
+		local number = techage.add_node(pos, "techage:ta4_battery")
+		M(pos):set_string("node_number", number)
 		on_timer(pos, 1)
 		minetest.get_node_timer(pos):start(30)
 	end,
 
+	after_dig_node = function(pos, oldnode, oldmetadata, digger)
+		techage.remove_node(pos, oldnode, oldmetadata)
+	end,
+	
 	on_timer = on_timer,
 
 	preserve_metadata = function(pos, oldnode, oldmetadata, drops)
@@ -154,9 +161,17 @@ else
 	})
 end
 
-techage.register_node({"techage:ta4_battery"},
-	{
-		on_node_load = function(pos)
-			minetest.get_node_timer(pos):start(30)
-		end,
+techage.register_node({"techage:ta4_battery"}, {
+	on_node_load = function(pos)
+		minetest.get_node_timer(pos):start(30)
+	end,
+	
+	on_recv_message = function(pos, src, topic, payload)
+		if topic == "load" then
+			local meta = minetest.get_meta(pos)
+			return calc_percent(meta:get_int("content"))
+		else
+			return "unsupported"
+		end
+	end,
 })
diff --git a/manuals/ta4_lua_controller_EN.md b/manuals/ta4_lua_controller_EN.md
index aa97019..34f0f34 100644
--- a/manuals/ta4_lua_controller_EN.md
+++ b/manuals/ta4_lua_controller_EN.md
@@ -358,7 +358,7 @@ In addition to Lua standard function the Lua Controller provides the following f
 | "state"      | one of: "empty", "loaded", "full"                            | State of a chest or Sensor Chest                             |
 | "fuel"       | number                                                       | fuel value of a fuel consuming block                         |
 | "depth"      | number                                                       | Read the current depth value of a quarry block (1..80)       |
-| "load"       | number                                                       | Read the load value in percent  (0..100) of a tank/storage block, a silo block, an accu block, or of the Signs Bot Box. Silo and tank return two values: The percentage value and the absolute value in units.<br /> Example: percent, absolute = $read_data("223", "load") |
+| "load"       | number                                                       | Read the load value in percent  (0..100) of a tank, silo, accu, or battery block, or from the Signs Bot Box. Silo and tank return two values: The percentage value and the absolute value in units.<br /> Example: percent, absolute = $read_data("223", "load") |
 | "delivered"  | number                                                       | Read the current delivered power value of a generator block. A power consuming block (accu) provides a negative value |
 | "action"     | player-name, action-string                                   | only for Sensor Chests                                       |
 | "stacks"     | Array with up to 4 Stores with the inventory content (see example) | only for Sensor Chests                                       |
diff --git a/manuals/ta4_lua_controller_EN.pdf b/manuals/ta4_lua_controller_EN.pdf
index 39d8dce..7469d82 100644
Binary files a/manuals/ta4_lua_controller_EN.pdf and b/manuals/ta4_lua_controller_EN.pdf differ
diff --git a/tools/repairkit.lua b/tools/repairkit.lua
index 7b641b2..548e449 100644
--- a/tools/repairkit.lua
+++ b/tools/repairkit.lua
@@ -237,10 +237,10 @@ local function read_state(itemstack, user, pointed_thing)
 					fuel = dump(fuel)
 					minetest.chat_send_player(user:get_player_name(), ndef.description.." "..number..": fuel = "..fuel.."    ")
 				end
-				local load = techage.send_single("0", number, "load", nil)
+				local load, abs = techage.send_single("0", number, "load", nil)
 				if load and load ~= "" and load ~= "unsupported" then
-					load = dump(load)
-					minetest.chat_send_player(user:get_player_name(), ndef.description.." "..number..": load = "..load.." %    ")
+					load, abs = dump(load), abs and dump(abs) or "--"
+					minetest.chat_send_player(user:get_player_name(), ndef.description.." "..number..": load = "..load.." % / "..abs.." units    ")
 				end
 				local delivered = techage.send_single("0", number, "delivered", nil)
 				if delivered and delivered ~= "" and delivered ~= "unsupported" then