diff --git a/lib/logitech_receiver/diversion.py b/lib/logitech_receiver/diversion.py
index 2437e91e..e8fb8e39 100644
--- a/lib/logitech_receiver/diversion.py
+++ b/lib/logitech_receiver/diversion.py
@@ -364,6 +364,15 @@ def thumb_wheel_down(f, r, d, a):
         return False
 
 
+def charging(f, r, d, a):
+    if (f == _F.BATTERY_STATUS and r == 0 and 1 <= d[2] <= 4) or \
+       (f == _F.BATTERY_VOLTAGE and r == 0 and d[2] & (1 << 7)) or \
+       (f == _F.UNIFIED_BATTERY and r == 0 and 1 <= d[2] <= 3):
+        return 1
+    else:
+        return False
+
+
 TESTS = {
     'crown_right': [lambda f, r, d, a: f == _F.CROWN and r == 0 and d[1] < 128 and d[1], False],
     'crown_left': [lambda f, r, d, a: f == _F.CROWN and r == 0 and d[1] >= 128 and 256 - d[1], False],
@@ -379,6 +388,7 @@ TESTS = {
     'lowres_wheel_down': [lambda f, r, d, a: f == _F.LOWRES_WHEEL and r == 0 and signed(d[0:1]) < 0 and signed(d[0:1]), False],
     'hires_wheel_up': [lambda f, r, d, a: f == _F.HIRES_WHEEL and r == 0 and signed(d[1:3]) > 0 and signed(d[1:3]), False],
     'hires_wheel_down': [lambda f, r, d, a: f == _F.HIRES_WHEEL and r == 0 and signed(d[1:3]) < 0 and signed(d[1:3]), False],
+    'charging': [charging, False],
     'False': [lambda f, r, d, a: False, False],
     'True': [lambda f, r, d, a: True, False],
 }