diff --git a/homeassistant/components/huawei_lte/device_tracker.py b/homeassistant/components/huawei_lte/device_tracker.py
index 83e82bf17ff..58e61c80bfe 100644
--- a/homeassistant/components/huawei_lte/device_tracker.py
+++ b/homeassistant/components/huawei_lte/device_tracker.py
@@ -3,11 +3,8 @@
 from __future__ import annotations
 
 import logging
-import re
 from typing import Any, cast
 
-from stringcase import snakecase
-
 from homeassistant.components.device_tracker import (
     DOMAIN as DEVICE_TRACKER_DOMAIN,
     ScannerEntity,
@@ -18,6 +15,7 @@ from homeassistant.helpers import entity_registry as er
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
 from homeassistant.helpers.entity import Entity
 from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
+from homeassistant.util import snakecase
 
 from . import Router
 from .const import (
@@ -156,22 +154,6 @@ def async_add_new_entities(
     async_add_entities(new_entities, True)
 
 
-def _better_snakecase(text: str) -> str:
-    # Awaiting https://github.com/okunishinishi/python-stringcase/pull/18
-    if text == text.upper():
-        # All uppercase to all lowercase to get http for HTTP, not h_t_t_p
-        text = text.lower()
-    else:
-        # Three or more consecutive uppercase with middle part lowercased
-        # to get http_response for HTTPResponse, not h_t_t_p_response
-        text = re.sub(
-            r"([A-Z])([A-Z]+)([A-Z](?:[^A-Z]|$))",
-            lambda match: f"{match.group(1)}{match.group(2).lower()}{match.group(3)}",
-            text,
-        )
-    return cast(str, snakecase(text))
-
-
 class HuaweiLteScannerEntity(HuaweiLteBaseEntity, ScannerEntity):
     """Huawei LTE router scanner entity."""
 
@@ -235,7 +217,7 @@ class HuaweiLteScannerEntity(HuaweiLteBaseEntity, ScannerEntity):
             self._ip_address = (host.get("IpAddress") or "").split(";", 2)[0] or None
             self._hostname = host.get("HostName")
             self._extra_state_attributes = {
-                _better_snakecase(k): v
+                snakecase(k): v
                 for k, v in host.items()
                 if k
                 in {
diff --git a/homeassistant/components/huawei_lte/manifest.json b/homeassistant/components/huawei_lte/manifest.json
index c2e945e9c49..63e9674565f 100644
--- a/homeassistant/components/huawei_lte/manifest.json
+++ b/homeassistant/components/huawei_lte/manifest.json
@@ -6,11 +6,7 @@
   "documentation": "https://www.home-assistant.io/integrations/huawei_lte",
   "iot_class": "local_polling",
   "loggers": ["huawei_lte_api.Session"],
-  "requirements": [
-    "huawei-lte-api==1.11.0",
-    "stringcase==1.2.0",
-    "url-normalize==2.2.1"
-  ],
+  "requirements": ["huawei-lte-api==1.11.0", "url-normalize==2.2.1"],
   "ssdp": [
     {
       "deviceType": "urn:schemas-upnp-org:device:InternetGatewayDevice:1",
diff --git a/homeassistant/components/huawei_lte/quality_scale.yaml b/homeassistant/components/huawei_lte/quality_scale.yaml
index 5d8a87b2843..57fce90fdd6 100644
--- a/homeassistant/components/huawei_lte/quality_scale.yaml
+++ b/homeassistant/components/huawei_lte/quality_scale.yaml
@@ -13,8 +13,8 @@ rules:
     status: todo
     comment: See if we can catch more specific exceptions in get_device_info.
   dependency-transparency:
-    status: todo
-    comment: stringcase is not built and published to PyPI from a public CI pipeline. huawei-lte-api is from https://gitlab.salamek.cz/Mirrors/huawei-lte-api, see https://github.com/Salamek/huawei-lte-api/issues/253
+    status: done
+    comment: huawei-lte-api is from https://gitlab.salamek.cz/Mirrors/huawei-lte-api, see https://github.com/Salamek/huawei-lte-api/issues/253
   docs-actions: done
   docs-high-level-description: done
   docs-installation-instructions: done
@@ -82,5 +82,4 @@ rules:
     status: exempt
     comment: Underlying huawei-lte-api does not use aiohttp or httpx, so this does not apply.
   strict-typing:
-    status: todo
-    comment: Integration is strictly typechecked already, and huawei-lte-api and url-normalize are in order. stringcase is not typed.
+    status: done
diff --git a/homeassistant/components/solaredge/coordinator.py b/homeassistant/components/solaredge/coordinator.py
index e69ed045024..37e871454d7 100644
--- a/homeassistant/components/solaredge/coordinator.py
+++ b/homeassistant/components/solaredge/coordinator.py
@@ -9,7 +9,6 @@ from typing import TYPE_CHECKING, Any
 
 from aiosolaredge import SolarEdge
 from solaredge_web import EnergyData, SolarEdgeWeb, TimeUnit
-from stringcase import snakecase
 
 from homeassistant.components.recorder import get_instance
 from homeassistant.components.recorder.models import (
@@ -26,7 +25,7 @@ from homeassistant.const import CONF_PASSWORD, CONF_USERNAME, UnitOfEnergy
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers import aiohttp_client
 from homeassistant.helpers.update_coordinator import DataUpdateCoordinator, UpdateFailed
-from homeassistant.util import dt as dt_util
+from homeassistant.util import dt as dt_util, snakecase
 from homeassistant.util.unit_conversion import EnergyConverter
 
 from .const import (
diff --git a/homeassistant/components/solaredge/manifest.json b/homeassistant/components/solaredge/manifest.json
index 15796f99ef3..295d562778f 100644
--- a/homeassistant/components/solaredge/manifest.json
+++ b/homeassistant/components/solaredge/manifest.json
@@ -14,9 +14,5 @@
   "integration_type": "device",
   "iot_class": "cloud_polling",
   "loggers": ["aiosolaredge", "solaredge_web"],
-  "requirements": [
-    "aiosolaredge==0.2.0",
-    "stringcase==1.2.0",
-    "solaredge-web==0.0.1"
-  ]
+  "requirements": ["aiosolaredge==0.2.0", "solaredge-web==0.0.1"]
 }
diff --git a/homeassistant/components/thermoworks_smoke/sensor.py b/homeassistant/components/thermoworks_smoke/sensor.py
index 7ce0dfb9993..46d0301db83 100644
--- a/homeassistant/components/thermoworks_smoke/sensor.py
+++ b/homeassistant/components/thermoworks_smoke/sensor.py
@@ -9,7 +9,7 @@ import logging
 
 from requests import RequestException
 from requests.exceptions import HTTPError
-from stringcase import camelcase, snakecase
+from stringcase import camelcase
 import thermoworks_smoke
 import voluptuous as vol
 
@@ -30,6 +30,7 @@ from homeassistant.core import HomeAssistant
 from homeassistant.helpers import config_validation as cv
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
+from homeassistant.util import snakecase
 
 _LOGGER = logging.getLogger(__name__)
 
diff --git a/homeassistant/components/traccar/manifest.json b/homeassistant/components/traccar/manifest.json
index 5d3b8361f1b..338b9d1ab8e 100644
--- a/homeassistant/components/traccar/manifest.json
+++ b/homeassistant/components/traccar/manifest.json
@@ -7,5 +7,5 @@
   "documentation": "https://www.home-assistant.io/integrations/traccar",
   "iot_class": "cloud_push",
   "loggers": ["pytraccar"],
-  "requirements": ["pytraccar==3.0.0", "stringcase==1.2.0"]
+  "requirements": ["pytraccar==3.0.0"]
 }
diff --git a/homeassistant/util/__init__.py b/homeassistant/util/__init__.py
index 17a4a86f106..f57966b2a30 100644
--- a/homeassistant/util/__init__.py
+++ b/homeassistant/util/__init__.py
@@ -97,6 +97,20 @@ def get_random_string(length: int = 10) -> str:
     return "".join(generator.choice(source_chars) for _ in range(length))
 
 
+# Adapted from https://github.com/okunishinishi/python-stringcase, with improvements
+def snakecase(text: str) -> str:
+    """Convert a string to snake_case."""
+    text = re.sub(r"[\s.-]", "_", text)
+    if not text.isupper():
+        # Underscore before last uppercase of groups of 2+ uppercase ("HTTPResponse", "IPAddress")
+        text = re.sub(
+            r"[A-Z]{2,}(?=[A-Z][^A-Z])", lambda match: match.group(0) + "_", text
+        )
+        # Underscore between non-uppercase followed by uppercase
+        text = re.sub(r"(?<=[^A-Z_])[A-Z]", lambda match: "_" + match.group(0), text)
+    return text.lower()
+
+
 class Throttle:
     """A class for throttling the execution of tasks.
 
diff --git a/requirements_all.txt b/requirements_all.txt
index 65aa7a1ff4f..a573ed2bc12 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -2899,11 +2899,6 @@ stookwijzer==1.6.1
 # homeassistant.components.streamlabswater
 streamlabswater==1.0.1
 
-# homeassistant.components.huawei_lte
-# homeassistant.components.solaredge
-# homeassistant.components.traccar
-stringcase==1.2.0
-
 # homeassistant.components.subaru
 subarulink==0.7.15
 
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index 7273d432b8e..e9784ae09c5 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -2408,11 +2408,6 @@ stookwijzer==1.6.1
 # homeassistant.components.streamlabswater
 streamlabswater==1.0.1
 
-# homeassistant.components.huawei_lte
-# homeassistant.components.solaredge
-# homeassistant.components.traccar
-stringcase==1.2.0
-
 # homeassistant.components.subaru
 subarulink==0.7.15
 
diff --git a/tests/components/huawei_lte/test_device_tracker.py b/tests/components/huawei_lte/test_device_tracker.py
deleted file mode 100644
index 56eb594fca0..00000000000
--- a/tests/components/huawei_lte/test_device_tracker.py
+++ /dev/null
@@ -1,20 +0,0 @@
-"""Huawei LTE device tracker tests."""
-
-import pytest
-
-from homeassistant.components.huawei_lte import device_tracker
-
-
-@pytest.mark.parametrize(
-    ("value", "expected"),
-    [
-        ("HTTP", "http"),
-        ("ID", "id"),
-        ("IPAddress", "ip_address"),
-        ("HTTPResponse", "http_response"),
-        ("foo_bar", "foo_bar"),
-    ],
-)
-def test_better_snakecase(value, expected) -> None:
-    """Test that better snakecase works better."""
-    assert device_tracker._better_snakecase(value) == expected
diff --git a/tests/util/test_init.py b/tests/util/test_init.py
index 111b086b48b..47e9981902c 100644
--- a/tests/util/test_init.py
+++ b/tests/util/test_init.py
@@ -233,3 +233,31 @@ async def test_throttle_async() -> None:
 
     assert (await test_method2()) is True
     assert (await test_method2()) is None
+
+
+@pytest.mark.parametrize(
+    ("input", "expected"),
+    [
+        ("fooBar", "foo_bar"),
+        ("FooBar", "foo_bar"),
+        ("Foobar", "foobar"),
+        ("Foo.bar", "foo_bar"),
+        ("_foo-Bar", "_foo_bar"),
+        ("HTTP", "http"),
+        ("HTTPResponse", "http_response"),
+        ("iPhone", "i_phone"),
+        ("IPAddress", "ip_address"),
+        ("IP_Address", "ip_address"),
+        ("My IP Address", "my_ip_address"),
+        ("LocalIP", "local_ip"),
+        ("Python3Thing", "python3_thing"),
+        ("mTLS", "m_tls"),
+        ("DTrace", "dtrace"),
+        ("IPv4", "ipv4"),
+        ("ID", "id"),
+        ("", ""),
+    ],
+)
+def test_snakecase(input, expected) -> None:
+    """Test snake casing a string."""
+    assert util.snakecase(input) == expected