2 files changed, 8 insertions, 1 deletions

diff --git a/firmware/export/powermgmt.h b/firmware/export/powermgmt.h
index 1a54006a7d..6ea4820b40 100644
--- a/firmware/export/powermgmt.h
+++ b/firmware/export/powermgmt.h
@@ -24,7 +24,11 @@
 #define BATTERY_LEVEL_EMPTY      265 /* 2.65V */
 #define BATTERY_LEVEL_DANGEROUS  280 /* 2.80V */
 #define BATTERY_LEVEL_FULL       400 /* 4.00V */
-
+#elif CONFIG_BATTERY == BATT_3AAA_ALKALINE /* Ondio, Alkalines */
+#define BATTERY_LEVEL_SHUTDOWN   250 /* 2.50V */
+#define BATTERY_LEVEL_EMPTY      260 /* 2.60V */
+#define BATTERY_LEVEL_DANGEROUS  270 /* 2.80V */
+#define BATTERY_LEVEL_FULL       450 /* 4.50V */
 #else /* Recorder, NiMH */
 #define BATTERY_LEVEL_SHUTDOWN   450 /* 4.50V */
 #define BATTERY_LEVEL_EMPTY      465 /* 4.65V */
diff --git a/firmware/powermgmt.c b/firmware/powermgmt.c
index e7486635d0..5648e52dab 100644
--- a/firmware/powermgmt.c
+++ b/firmware/powermgmt.c
@@ -95,6 +95,9 @@ static const int percent_to_volt_decharge[11] =
 #if CONFIG_BATTERY == BATT_LIION2200
     /* measured values */
     260, 285, 295, 303, 311, 320, 330, 345, 360, 380, 400
+#elif CONFIG_BATTERY == BATT_3AAA_ALKALINE
+    /* taken from a textbook alkaline discharge graph, not measured */
+    270, 303, 324, 336, 348, 357, 366, 378, 390, 408, 450
 #else /* NiMH */
     /* original values were taken directly after charging, but it should show
        100% after turning off the device for some hours, too */