RYOBI ONE+ 18V Lithium-Ion 4.0 Ah Compact Battery (2-Pack) and Charger Kit with FREE Cordless ONE+ 4-1/2 in. Angle Grinder PSK006-PCL445B - The Home Depot
RYOBI ONE+ 18V HIGH PERFORMANCE Lithium-Ion 4.0 Ah Battery and Charger Starter Kit PSK004 - The Home Depot
Amazon.com: generic1 Ryobi ONE+ 18V Lithium-Ion 4.0 Ah Battery (2-Pack) and Charger Kit, 1 (PSK006) : Tools & Home Improvement