diff --git a/app/module/drivers/sensor/battery/battery_common.c b/app/module/drivers/sensor/battery/battery_common.c
index 0733116a..f0adaf60 100644
--- a/app/module/drivers/sensor/battery/battery_common.c
+++ b/app/module/drivers/sensor/battery/battery_common.c
@@ -50,7 +50,7 @@ uint8_t lithium_ion_mv_to_pct(int16_t batt_mv) {
         return battery_lookup[0].percent;
     }
 
-    for (int i = 0; i < ARRAY_SIZE(battery_lookup); i++) {
+    for (int i = 1; i < ARRAY_SIZE(battery_lookup); i++) {
         struct lookup_point one = battery_lookup[i - 1];
         struct lookup_point two = battery_lookup[i];
         if (batt_mv >= two.millivolts) {