DeWalt offers a 2.0 AMP version (DCB203BT) and a 4.0 Amp version (DCB204BT) of the 20V MAX Li-ion Batteries with Bluetooth capability. These batteries pair with Apple and Android smart devices via the free Tool Connect App to give users the ability to control compatible DeWalt batteries remotely via a Bluetooth device. From the Tool Connect App home screen, users can select an individual battery to view its diagnostics and change settings by tabbing through four pages: Diagnostics, Actions, Info and Alerts. The Diagnostics screen indicates an individual battery’s state of charge, temperature and connection to Bluetooth.