If no battery information, do not try to split.

build/android/buildbot/bb_device_status_check.py

Index: build/android/buildbot/bb_device_status_check.py
diff --git a/build/android/buildbot/bb_device_status_check.py b/build/android/buildbot/bb_device_status_check.py
index 94c741fe13d739da9e949e28dd0125b290dc889e..d064633ae94aaf0ba1d2623d15e6093f1742316a 100755
--- a/build/android/buildbot/bb_device_status_check.py
+++ b/build/android/buildbot/bb_device_status_check.py
@@ -63,6 +63,12 @@ def DeviceInfo(serial, options):
       return lambda_function(found[0])
     return 'Unknown'
 
+  def _GetBatteryInfo(battery):
+    if not battery:
+      return 'No battery info.'
+    battery_info = battery.split('\n')
+    return battery_info[0] + '\n  '.join(battery_info[1:])
+
   ac_power = _GetData('AC powered: (\w+)', battery)
   battery_level = _GetData('level: (\d+)', battery)
   imei_slice = _GetData('Device ID = (\d+)',
@@ -71,7 +77,7 @@ def DeviceInfo(serial, options):
   report = ['Device %s (%s)' % (serial, device_type),
             '  Build: %s (%s)' %
               (device_build, device_adb.old_interface.GetBuildFingerprint()),
-            '  %s' % '\n  '.join(battery.split('\n')),
+            '  %s' % _GetBatteryInfo(battery),
             '  IMEI slice: %s' % imei_slice,
             '  Wifi IP: %s' % device_adb.old_interface.GetWifiIP(),
             '']