I measured the sleep current.
This is a preliminary report, but the values are roughly the same as those for the ncs+zephyr setup, even with ArduinoCore.
//-----------------------------------------------------------------------------
// BSP : Nrf54L15-Clean-Implementation v0.1.112
// 2026/03/22
//-----------------------------------------------------------------------------
// Important Notice:Tools->PowerProfile=WFI Idle
// Apply 3.8 V to the Vbat pad from PPK2
void setup() {
pinMode(LED_BUILTIN, OUTPUT);
}
void loop() {
// Blink LED 5 times
for(int i = 0; i < 5; i++) {
digitalWrite(LED_BUILTIN, LOW);
delay(100);
digitalWrite(LED_BUILTIN, HIGH);
delay(100);
}
// Light Sleep (warm boot)
delay(5000); // 3 uA
// Deep Sleep (cold boot)
delaySystemOffNoRetention(5000UL); // 1.5 uA
}