The Joy Factory Pinpoint Precision Rechargeable Active Digital Stylus X1 with Fine Tip for iPad Air, iPad 2/3/4, iPad mini, & iPhone (BCU205) Battery: Rechargeable Polymer Lithium battery 280mAh Battery Life: 4 weeks (based on continuous use for 30 minutes to an hour daily) Indicator Light: Illuminated when activated with ON/OFF button Weight: 0.10 lbs. with battery, 0.05 lbs. without battery Stand-Alone Active Stylus Design: NO BLUETOOTH PARING OR APP REQUIRED. And still works with any app, including popular apps such as ZoomNotes, Evernote, Paper by FiftyThree, ProCreate, and many more.