diff --git a/Battery-Possibilities.md b/Battery-Possibilities.md
index 787478c..27790d8 100644
--- a/Battery-Possibilities.md
+++ b/Battery-Possibilities.md
@@ -9,7 +9,7 @@ https://randomnerdtutorials.com/esp8266-deep-sleep-with-arduino-ide/#:~:text=To%
 
 Omit a charging circuit or replaceable batteries (rechargeable)
 
-LiFePo4 Battery (max < 3,6 Volt)
+LiFePo4 Battery (max < 3,6 Volt and 3.3 Volt recommended)
 
 trigBoard has an extremely low power consuption.