Amazon.com: Synergy Digital Power Tool Battery, Compatible with Makita BDF440 Power Tool, (Li-Ion, 18V, 3000 mAh) Ultra High Capacity, Replacement for Makita 194204-5 Battery : Tools & Home Improvement
New Genuine Makita 643811-6 Terminal 14.4v for BDF440 BDF441 BDA340 BUC121 | eBay