How frequently does the reader need to be recharged?
There is a battery icon on the reader which will indicate battery life. With normal use, the reader can be used for approximately 7 days before it needs to be recharged. A Low Battery warning will appear on the reader when it needs to be recharged. A Low Battery message accompanies a result when users have enough charge remaining for about one day of use. Users can scan their Sensor when the battery is low and when charging the reader.1
Reference
1. FreeStyle Libre flash glucose monitoring system User's Manual.