diff --git a/basic_machines/technic_power.lua b/basic_machines/technic_power.lua
index c755206..c6ae0ae 100644
--- a/basic_machines/technic_power.lua
+++ b/basic_machines/technic_power.lua
@@ -117,7 +117,7 @@ local machines_activate_furnace = minetest.registered_nodes["default:furnace"].o
 minetest.register_node("basic_machines:battery_0", {
 	description = "battery - stores energy, generates energy from fuel, can power nearby machines, or accelerate/run furnace above it. Its upgradeable.",
 	tiles = {"basic_machine_outlet.png","basic_machine_side.png","basic_machine_battery_0.png"},
-	groups = {cracky=3, mesecon_effector_on = 1},
+	groups = {cracky=3, mesecon_effector_on = 1, tubedevice = 1, tubedevice_receiver = 1},
 	sounds = default.node_sound_wood_defaults(),
 	after_place_node = function(pos, placer)
 		local meta = minetest.get_meta(pos);
@@ -333,7 +333,7 @@ end
 minetest.register_node("basic_machines:generator", {
 	description = "Generator - very expensive, generates power crystals that provide power. Its upgradeable.",
 	tiles = {"basic_machine_generator.png"},
-	groups = {cracky=3, mesecon_effector_on = 1},
+	groups = {cracky=3, mesecon_effector_on = 1, tubedevice = 1, tubedevice_receiver = 1},
 	sounds = default.node_sound_wood_defaults(),
 	after_place_node = function(pos, placer)
 		local meta = minetest.get_meta(pos);