I had a notification for when this deal would pop back up. I purchased one last week and didn't see it posted yet.
18V LXT Lithium-Ion High Capacity Battery Pack 4.0Ah w/Fuel Gauge, Charger Starter Kit W/BONUS Lightweight Circular Saw [homedepot.com]
BL1840BDC1 - 18-Volt LXT lithium-Ion 4.0 Ah battery reaches a full charge in 40-minutes or less
Makita-built motor delivers 3,700 RPM for faster cutting
Weighs only 7.3 lbs. with battery (battery not included)
6-1/2" blade delivers a 2-1/4" cutting capacity