One battery two voltage settings. Use this high performance lithium-ion battery with ATLAS 80v tools for ultimate power and performance. Install the battery in an ATLAS 40v tool and it intelligently switches voltage giving up to 2X runtime over a 40v 2.5 Ah battery.

Atlas 80V 2.5 Ah 40V 5.0Ah Lithium-Ion Battery 57014
$59.91