Update I2C configuration for battery sensor and adjust frequency settings

esphome/ha-remote/ha-remote-1.base.yaml

@@ -3,10 +3,14 @@ psram:
   speed: 80MHz
 
 i2c:
-  id: i2c_main
-  sda: 8
-  scl: 9
-  frequency: 100kHz
+  - id: i2c_main
+    sda: 8
+    scl: 9
+    frequency: 400kHz
+  - id: i2c_battery
+    sda: 40  # Verify these pins are free on your board
+    scl: 41
+    frequency: 400kHz
 
 # CH422G I/O expander (Waveshare uses it for LCD reset/backlight/touch reset)
 ch422g:
@@ -135,7 +139,7 @@ font:
 sensor:
   - platform: max17043
     id: max17048_battery
-    i2c_id: i2c_main
+    i2c_id: i2c_battery
     update_interval: 120s
     battery_voltage:
       name: "Remote Battery Voltage"