diff --git a/adafruit_lc709203f.py b/adafruit_lc709203f.py
index 8384e81..0bca587 100644
--- a/adafruit_lc709203f.py
+++ b/adafruit_lc709203f.py
@@ -96,6 +96,7 @@ class PackSize(CV):
     (
         ("MAH100", 0x08, "100 mAh", 100),
         ("MAH200", 0x0B, "200 mAh", 200),
+        ("MAH400", 0x0E, "400 mAh", 400),
         ("MAH500", 0x10, "500 mAh", 500),
         ("MAH1000", 0x19, "1000 mAh", 1000),
         ("MAH2000", 0x2D, "2000 mAh", 2000),