Makita BL1850B2DC2 18V LXT® Lithium-Ion Battery and Dual Port Charger Starter Pack (5.0Ah) - Amazon.com
DEWALT 20-V 2-Pack 5 Amp-Hour; 5 Amp-Hour Lithium-ion Battery and Charger (Charger Included) in the Power Tool Batteries & Chargers department at Lowes.com