You are downloading the Battery Level XAP file v188.8.131.52 for Windows Phone. Battery Level is a free and useful Productivity app: Battery Level just got better! The app provides "missing feature" of Windows Phone 8 - the battery level percentage on the main screen and the ... You can now download the offline XAP file to install & try it.
Download Locations for Battery Level 184.108.40.206 XAP file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline XAP File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Battery Level XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.