Ryobi P197 Battery ONE + (PLUS) Compatible Replaces P108 Rechargeable Lithium Ion 18 v Volt 4.0 Ah / 72 Wh UL Listed Faster Recharge Single Battery with Fuel Gage - - Amazon.com
RYOBI ONE+ 18V HIGH PERFORMANCE Lithium-Ion 4.0 Ah Battery and Charger Starter Kit PSK004 - The Home Depot
For RYOBI P108 18V ONE+ 4Ah Lithium-Ion Battery (Pack) with Charger Kit PSK004 | eBay
Ryobi 18V One+ 4.0AH High Performance Battery and Charger Starter Kit - - Amazon.com