diff --git a/src/vitabel/utils/loading.py b/src/vitabel/utils/loading.py
index 53fd227..551e632 100644
--- a/src/vitabel/utils/loading.py
+++ b/src/vitabel/utils/loading.py
@@ -2914,7 +2914,7 @@ def read_eolife_export(eolife_filepath: Path) -> EOLifeRecord:
         header=0,
         nrows=1,
         encoding="latin1",
-        na_values="NA",
+        na_values=["Na", "NA"],
         usecols=[
             "Date",
             "Time",
@@ -2961,7 +2961,7 @@ def read_eolife_export(eolife_filepath: Path) -> EOLifeRecord:
         skiprows=3, 
         header=0,
         encoding="latin1",
-        na_values="Na",
+        na_values=["Na", "NA"],
         usecols=[
             "Cycle number",
             "Time (hh:mm:ss:SS)",
@@ -2986,7 +2986,7 @@ def read_eolife_export(eolife_filepath: Path) -> EOLifeRecord:
             "Leakage (mL)": "Int64",
         },
         converters={
-            "Leakage ratio (%)": lambda x: float(x) / 100 if x != "NA" else None
+            "Leakage ratio (%)": lambda x: float(x) / 100 if x not in ["Na", "NA"] else None
         },
     )