minetest.register_craft({ output = 'technic:lv_battery_box0', recipe = { {'technic:battery', 'group:wood', 'technic:battery'}, {'technic:battery', 'default:copper_ingot', 'technic:battery'}, {'technic:cast_iron_ingot', 'technic:cast_iron_ingot', 'technic:cast_iron_ingot'}, } }) technic.register_battery_box({ tier = "LV", max_charge = 40000, charge_rate = 1000, discharge_rate = 4000, charge_step = 500, discharge_step = 800, })