From aa19718ba430698f271e7ae7ce98b332451f067a Mon Sep 17 00:00:00 2001
From: Dmitry Galenko <dmitry@galenko.su>
Date: Wed, 14 Dec 2022 17:26:55 +0100
Subject: [PATCH] Change condition for low-voltage killswitch

---
 src/Power.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/Power.cpp b/src/Power.cpp
index ff6105338..ec86adc94 100644
--- a/src/Power.cpp
+++ b/src/Power.cpp
@@ -568,8 +568,12 @@ bool Power::axpChipInit()
     }
     DEBUG_MSG("=======================================================================\n");
 
-// Disable shutdown for non ESP32 boards
-#ifdef ARCH_ESP32
+// We can safely ignore this approach for most (or all) boards because MCU turned off
+// earlier than battery discharged to 2.6V.
+//
+// Unfortanly for now we can't use this killswitch for RAK4630-based boards because they have a bug with
+// battery voltage measurement. Probably it sometimes drops to low values.
+#ifndef RAK4630
     // Set PMU shutdown voltage at 2.6V to maximize battery utilization
     PMU->setSysPowerDownVoltage(2600);
 #endif