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
P191 Ryobi 18V Lithium Battery Rebuild Service – MTO Battery
6.0Ah For RYOBI P108 18V One+ Plus High Capacity Battery 18 Volt Lithium-Ion New | eBay