diff --git a/variants/t1000-e/T1000eBoard.cpp b/variants/t1000-e/T1000eBoard.cpp
index a17711db..5d6fea76 100644
--- a/variants/t1000-e/T1000eBoard.cpp
+++ b/variants/t1000-e/T1000eBoard.cpp
@@ -1,6 +1,6 @@
 #include <Arduino.h>
 #include "T1000eBoard.h"
-#include <Wire.h>
+// #include <Wire.h>
 
 #include <bluefruit.h>
 
@@ -18,12 +18,12 @@ void T1000eBoard::begin() {
 #endif
 
 #if defined(PIN_BOARD_SDA) && defined(PIN_BOARD_SCL)
-  Wire.setPins(PIN_BOARD_SDA, PIN_BOARD_SCL);
+  // Wire.setPins(PIN_BOARD_SDA, PIN_BOARD_SCL);
 #endif
 
-  Wire.begin();
+  // Wire.begin();
 
-  delay(10);   // give sx1262 some time to power up
+  delay(10);   // give LR11x0 some time to power up
 }
 
 #if 0
diff --git a/variants/t1000-e/T1000eBoard.h b/variants/t1000-e/T1000eBoard.h
index 24584757..7660590d 100644
--- a/variants/t1000-e/T1000eBoard.h
+++ b/variants/t1000-e/T1000eBoard.h
@@ -40,7 +40,8 @@ class T1000eBoard : public mesh::MainBoard {
     digitalWrite(PIN_3V3_EN, LOW);
    #endif
 
-    analogReference(AR_DEFAULT);  // put back to default
+    // reset ADC reference to default to save power
+    analogReference(AR_DEFAULT);
     analogReadResolution(10);
 
     return volts * 1000;
@@ -87,6 +88,9 @@ class T1000eBoard : public mesh::MainBoard {
     #ifdef LED_PIN
     digitalWrite(LED_PIN, LOW);
     #endif
+
+    radio.sleep();
+
     #ifdef BUTTON_PIN
     nrf_gpio_cfg_sense_input(digitalPinToInterrupt(BUTTON_PIN), NRF_GPIO_PIN_NOPULL, NRF_GPIO_PIN_SENSE_HIGH);
     #endif
diff --git a/variants/t1000-e/t1000e_sensors.cpp b/variants/t1000-e/t1000e_sensors.cpp
index 17693022..8f8f89c0 100644
--- a/variants/t1000-e/t1000e_sensors.cpp
+++ b/variants/t1000-e/t1000e_sensors.cpp
@@ -99,6 +99,10 @@ float t1000e_get_temperature( void )
     digitalWrite(PIN_3V3_EN, LOW);
     digitalWrite(SENSOR_EN, LOW);
 
+    // reset ADC reference to default to save power
+    analogReference(AR_DEFAULT);
+    analogReadResolution(10);
+
     return get_heater_temperature (vcc_v, ntc_v);
 }
 
@@ -114,6 +118,10 @@ uint32_t t1000e_get_light( void )
     lux_v = 1000 * analogRead(LUX_SENSOR) * AREF_VOLTAGE / 4096;
     lux = get_light_lv( lux_v );
     digitalWrite(SENSOR_EN, LOW);
+
+    // reset ADC reference to default to save power
+    analogReference(AR_DEFAULT);
+    analogReadResolution(10);
  
     return lux;
 }
\ No newline at end of file
diff --git a/variants/t1000-e/target.cpp b/variants/t1000-e/target.cpp
index 06509c4f..e64195e4 100644
--- a/variants/t1000-e/target.cpp
+++ b/variants/t1000-e/target.cpp
@@ -58,6 +58,7 @@ bool radio_init() {
   if (status != RADIOLIB_ERR_NONE) {
     Serial.print("ERROR: radio init failed: ");
     Serial.println(status);
+    SPI.end();
     return false;  // fail
   }
   
@@ -71,6 +72,8 @@ bool radio_init() {
   radio.setRxBoostedGainMode(RX_BOOSTED_GAIN);
 #endif
 
+  radio.sleep();
+
   return true;  // success
 }
 
@@ -79,23 +82,34 @@ uint32_t radio_get_rng_seed() {
 }
 
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
+  radio.standby();
+  delayMicroseconds(100);
   radio.setFrequency(freq);
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio.sleep();
 }
 
 void radio_set_tx_power(uint8_t dbm) {
+  radio.standby();
+  delayMicroseconds(100);
   radio.setOutputPower(dbm);
+  radio.sleep();
 }
 
 mesh::LocalIdentity radio_new_identity() {
+  radio.standby();
+  delayMicroseconds(100);
   RadioNoiseListener rng(radio);
-  return mesh::LocalIdentity(&rng);  // create new random identity
+  mesh::LocalIdentity identity = mesh::LocalIdentity(&rng);  // create new random identity
+  radio.sleep();
+  return identity;
 }
 
 void T1000SensorManager::start_gps() {
   gps_active = true;
+  Serial1.begin(115200);
   //_nmea->begin();
   // this init sequence should be better 
   // comes from seeed examples and deals with all gps pins
@@ -132,6 +146,7 @@ void T1000SensorManager::sleep_gps() {
 
 void T1000SensorManager::stop_gps() {
   gps_active = false;
+  Serial1.end();
   digitalWrite(GPS_VRTC_EN, LOW);
   digitalWrite(GPS_EN, LOW);
   digitalWrite(GPS_RESET, HIGH);
@@ -144,9 +159,6 @@ void T1000SensorManager::stop_gps() {
 
 
 bool T1000SensorManager::begin() {
-  // init GPS
-  Serial1.begin(115200);
-
   // make sure gps pin are off
   digitalWrite(GPS_VRTC_EN, LOW);
   digitalWrite(GPS_RESET, LOW);
diff --git a/variants/t1000-e/variant.cpp b/variants/t1000-e/variant.cpp
index f17b3a8d..a9b9316a 100644
--- a/variants/t1000-e/variant.cpp
+++ b/variants/t1000-e/variant.cpp
@@ -63,14 +63,12 @@ const uint32_t g_ADigitalPinMap[PINS_COUNT + 1] =
 
 void initVariant()
 {
-  // All pins output HIGH by default.
-  // https://github.com/Seeed-Studio/Adafruit_nRF52_Arduino/blob/fab7d30a997a1dfeef9d1d59bfb549adda73815a/cores/nRF5/wiring.c#L65-L69
-
-  pinMode(BATTERY_PIN, INPUT);
-  pinMode(EXT_CHRG_DETECT, INPUT);
-  pinMode(EXT_PWR_DETECT, INPUT);
-  pinMode(GPS_RESETB, INPUT);
-  pinMode(PIN_BUTTON1, INPUT);
+  // Battery optimization: Input pins with appropriate pull resistors to prevent floating
+  pinMode(BATTERY_PIN, INPUT);               // ADC input, no pull needed
+  pinMode(EXT_CHRG_DETECT, INPUT_PULLDOWN);  // Battery optimization: Pull down to prevent floating
+  pinMode(EXT_PWR_DETECT, INPUT_PULLDOWN);   // Battery optimization: Pull down to prevent floating
+  pinMode(GPS_RESETB, INPUT_PULLUP);         // Battery optimization: Pull up for GPS reset
+  pinMode(PIN_BUTTON1, INPUT_PULLUP);        // Battery optimization: Pull up for button (active low)
 
   pinMode(PIN_3V3_EN, OUTPUT);
   pinMode(PIN_3V3_ACC_EN, OUTPUT);