You are downloading the Better Battery XAP file v188.8.131.52 for Windows Phone. Better Battery is a free and useful Productivity app: Welcome to the Better Battery app, the first truly live tile battery app (Live tile updates every minute instead of 30 minutes). The ... You can now download the offline XAP file to install & try it.
Download Locations for Better Battery 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 Better Battery XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.