XL Battery for R1 Handheld Radio with double talk time is a high capacity battery suitable for Rugged Radios R1 and critical for race events requiring extended battery life. This XL battery, perfect as a spare or backup, has a built-in charging port for on-the-go charging using the provided R1 USB charging cable. The battery, also fit for weekend adventures has a capacity of 3600 mAh, voltage of 7.4V and is of Lithium-Ion type. Can either be charged via cable or cradle. Comes with a high capacity battery, belt clip, and a USB charging cable. Works with Rugged Radios R1.