Makita 40V max XGT 4.0Ah Battery and Charger Starter Pack, BL4040, DC40RA (4.0Ah) BL4040DC1 - The Home Depot
Amazon.com: WORTHMAH 3.0Ah 40V XGT MAX Li-ion Battery Replacement for Makita 40V XGT MAX Battery and Compatible with All Makita 40V XGT Tools and Makita 40V Chargers : Tools & Home Improvement