Super Battery Saver This may seem a crude application to most, but for me it was a learning experience and an effort worth a good 2 hours! It's a simple widget that shows you the battery level and an estimated usage time remaining.
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IQ Empty Battery Italian Use this application to empty your phone's battery to charge it from zero, or compare two batteries to see which one lasts longer
Battery Manager Do You Want To Increase Your Battery Life,Then This Will Do It