diff --git a/Drivers/BQ27220/README.md b/Drivers/BQ27220/README.md
index 5ecc1181..6a9240a5 100644
--- a/Drivers/BQ27220/README.md
+++ b/Drivers/BQ27220/README.md
@@ -1,5 +1,6 @@
-# BQ24295
+# BQ27220
 
-Power management: I2C-controlled 3A single cell USB charger with narrow VDC 4.5-5.5V adjustable voltage at 1.5A synchronous boost operation.
+Power management: Single-Cell CEDV Fuel Gauge
 
-[Datasheet](https://www.ti.com/lit/ds/symlink/bq24295.pdf)
+[Datasheet](https://www.ti.com/lit/gpn/bq27220)
+[User Guide](https://www.ti.com/lit/pdf/sluubd4)
diff --git a/Drivers/BQ27220/Source/Bq27220.cpp b/Drivers/BQ27220/Source/Bq27220.cpp
index 9a67ff51..cbf31ebb 100644
--- a/Drivers/BQ27220/Source/Bq27220.cpp
+++ b/Drivers/BQ27220/Source/Bq27220.cpp
@@ -7,9 +7,9 @@
 
 #define ARRAYSIZE(a) (sizeof(a) / sizeof(*(a)))
 
-uint8_t highByte(const uint16_t word) { return (word >> 8) & 0xFF; }
-uint8_t lowByte(const uint16_t word) { return word & 0xFF; }
-void swapEndianess(uint16_t &word) { word = (lowByte(word) << 8) | highByte(word); }
+static uint8_t highByte(const uint16_t word) { return (word >> 8) & 0xFF; }
+static uint8_t lowByte(const uint16_t word) { return word & 0xFF; }
+static constexpr void swapEndianess(uint16_t &word) { word = (lowByte(word) << 8) | highByte(word); }
 
 namespace registers {
     static const uint16_t SUBCMD_CTRL_STATUS                    = 0x0000U;
@@ -314,8 +314,6 @@ bool Bq27220::configPreamble(bool &isSealed) {
         if (!unsealFullAccess()) {
             TT_LOG_E(TAG, "Unsealing full access failure!");
             return false;
-        } else {
-            TT_LOG_I(TAG, "Full access theoretically.");
         }
     }
 
diff --git a/Drivers/BQ27220/Source/Bq27220.h b/Drivers/BQ27220/Source/Bq27220.h
index abf5b86d..0054bf32 100644
--- a/Drivers/BQ27220/Source/Bq27220.h
+++ b/Drivers/BQ27220/Source/Bq27220.h
@@ -20,6 +20,11 @@ private:
     template<typename T>
     bool performConfigUpdate(T configUpdateFunc)
     {
+        // Configuration routine lifted from
+        // https://github.com/Xinyuan-LilyGO/T-Echo/blob/main/lib/SensorLib/src/GaugeBQ27220.hpp
+        // Copyright (c) 2025 lewis he
+        // SPDX-License-Identifier: MIT
+
         bool isSealed = false;
 
         if (!configPreamble(isSealed)) {
@@ -32,6 +37,10 @@ private:
     }
 
 public:
+    // Register structures lifted from
+    // https://github.com/Xinyuan-LilyGO/T-Deck-Pro/blob/master/lib/BQ27220/bq27220.h
+    // Copyright (c) 2025 Liygo / Shenzhen Xinyuan Electronic Technology Co., Ltd
+
     union BatteryStatus {
         struct
         {