Clarify charger battery ratings and keep host checks portable

docs/charge_voltage.md

@@ -37,6 +37,8 @@ is failing, but it avoids silently resetting a saved lower target to 4.2 V.
 | LilyGo T-Beam SX1262 or SX1276 | AXP2101 | 4.00, 4.10, 4.20, 4.35, 4.40 |
 | LilyGo T-Beam S3 Supreme SX1262 | AXP2101 | 4.00, 4.10, 4.20, 4.35, 4.40 |
 
+Targets above 4.2 V require batteries rated for the selected charge voltage.
+
 The classic T-Beam driver detects the fitted AXP192 or AXP2101. Radio type does
 not determine which PMU is present. T-Beam 1W uses a different power design and
 does not support this setting.

docs/cli_commands.md

@@ -435,9 +435,9 @@ remain available.
 
 ### Switch the OTA release channel (observer builds)
 
-- `ota branch` — shows the selected channel, the channel this build was made for, and the manifest base `ota check`/`ota update` will use.
-- `ota branch prod` (alias `stable`) / `ota branch beta` (alias `dev`) — pull future `ota update`s from that channel. The selection is saved; run `ota update` to switch.
-- `ota branch default` — follow the channel this build was made for.
+- `ota branch` - shows the selected channel, the channel this build was made for, and the manifest base `ota check`/`ota update` will use.
+- `ota branch prod` (alias `stable`) / `ota branch beta` (alias `dev`) - pull future `ota update`s from that channel. The selection is saved; run `ota update` to switch.
+- `ota branch default` - follow the channel this build was made for.
 
 The selector is saved only after the preferences transaction succeeds. A queued
 `ota update` keeps the channel it checked, even if `ota branch` is changed before

test/test_battery_charge_cli.py

@@ -2,11 +2,14 @@
 """Run the production charger CLI with hardware/storage failure fixtures."""
 
 from pathlib import Path
+import os
 import subprocess
 import tempfile
 import unittest
 
 ROOT = Path(__file__).resolve().parents[1]
+SANITIZER_FLAGS = [] if os.name == "nt" else [
+    "-fsanitize=address,undefined", "-fno-omit-frame-pointer", "-fno-pie", "-no-pie"]
 
 
 class BatteryChargeCliTest(unittest.TestCase):
@@ -119,7 +122,7 @@ int main() {
             (path / "test.cpp").write_text(source, encoding="ascii")
             binary = path / "test"
             subprocess.run(["c++", "-std=c++11", "-Wall", "-Wextra",
-                            "-fsanitize=address,undefined", "-fno-omit-frame-pointer",
+                            *SANITIZER_FLAGS,
                             "-I", str(ROOT / "src"), str(path / "test.cpp"),
                             "-o", str(binary)], check=True, capture_output=True)
             subprocess.run([str(binary)], check=True)