Is there a way to charge the batteries while a long study is in progress?

Yes, the Dual Lead Rechargeable Battery (Part #: RF46) allows you to connect the battery to both the module and the charger while the module is in use. Place the dual lead battery in the module and connect one lead to the module and the other to the charger by using the three-foot extension cable (Part #: RF43). This enables you to charge the battery without removing the battery from the module.