Makita Cordless Angle Grinder, Model Name/Number: GA005G
Amazon.com: Synergy Digital Power Tool Battery, Compatible with Makita GA005G Power Tool, (Li-Ion, 40V, 4000mAh) Ultra High Capacity, Replacement for Makita BL4020 Battery : Tools & Home Improvement
MAKITA GA005G Cordless 125 mm (5″) Angle Grinder, Anti-Restart Function | eBay